No power to ac relay The wiring harness feeding the ac consists or two pairs of wires. Replaced compressor, condenser, inline filter, freon & oil. Is the AC not working at all or is it just lacking power? Customer: Ac was working ice cold no power to the compressor now Mechanic's Assistant: Have you checked the fuses related to the AC system in your Ford F650? An AC relay is a switch usually located on the outdoor unit. On this model there is no ac clutch relay. Relay is good used TECH II tool to engage relay and compressor turns on (it happens to be shot Electronics-Salon 1PCS Dual SPST-NO 10Amp Power Relay Module, AC/DC 24V Control Voltage. The power is switch on by the ECM control relay, and power is supplied by ECM fusible link 30 amp. 99. Upvote #4 05-19-12, 05:30 PM Has no power to compressor has ground, new relay, fuse is good and also has no power to pressure switch, but has power to cycling switch. pressure switch fuses relays are good. I have no DC power to the AC compressor. Relay checks out good but I’m not getting a ground to the. So the wire running from No power to the ac compressor. We have power at the relay and the high pressure switch has power and ground . here is the wiring diagram. System is fully charged. #2078836 - 06/25/10 09:12 AM Re: no power going to ac compressor [Re: larryo340] 98P73_IRAQ Over the Hill Registered: 04/26/08 Posts: 2954 Loc: iraq-baghdad-hell's street NO Power getting to ac. 6 . Air Conditioning and Cooling Systems - No power to A/C condenser relay - I ran my a/c a few weeks ago and all was well. If that still all checks out good, I would run a wire from the AC switch to the relay. AC worked fine before now compressor clutch won't engage. Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? Consistent. Get it as soon as Monday, Feb 24. The pcm is another. Checked the fuse and relay for the compressor clutch. AC fuse in the main relay/fuse box in the engine bay is working and getting 12v. Bypassed hi and low pressure switches, no power to compressor. The paper clip eliminates that possibility. i dont know what else to It read high pressure in the red (not really expecting anything meaningful without the compressor running). (3) The relay normally open terminal cavity (87) is connected to the compressor clutch coil. AC Charge is good in system. Sep 27, 2015 #7. Answered by Wayne in 18 mins 2 years ago. $14. Have changed relay and hvac controller still nothing also tested pressure switch and checks good. If no power at the GREEN wire, ground the DARK BLUE wire - this bypasses computer control & the relay should turn on, you should have power at the GREEN AC worked fine one day then it didn't. No power at AC Compressor. 8L AC Compressor will not engage I have bypassed low pressure switch. My panel has a red slash mark through the A/C snow flake symbol on control panel. I have checked all of GM tech bulletins. IanG, Sep 27, 2015. The ac control relay and the breaker are working. now im assuming it's the climate control. Ask for help, 24/7. I found a schematic of the system and started checking wires. Also inspect the socket it goes into and make sure it looks ok (since you don't know what to look for, just pull the adjacent relay and compare the two to see if anything looks out of place with the AC relay socket) - the relay is inexpensive and an easy fix. 02v. No lights, nothing. Or fastest delivery Wed, Dec 18. I switched relays, still nothing and the one I took out worked in different location. The fuses under the dash and the hood are OK. Having trouble locating the relay for the ac system dealers haven’t been able to tell me and the owners manual only shows a fuse . The other two pins is power with ignition on and a ground when the AC is turned on. Engineered for high-power industrial applications requiring reliable and efficient performance. Relay 1 & 2 circuits are 2N2222 rated at 600 ma which should activate the relay coil directly via pin-54 & provide sensing to pin-10. If eveything checks good so far start car/AC on & check for power at the GREEN compressor relay wire - if it has power you have a wiring problem to the compressor or a bad compressor clutch. 15,012 Satisfied Customers. The system is has pressure. 99 $ 14. The pcm turns on the relay by applying ground to it. no power to ac relay. Would you like any additional help or Electromagnetic Power Relay, 8-Pin 10 AMP 110V/120V AC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY2NJ [Applicable for DIN Rail System] $8. If it does, the wiring to the clutch is I am working on my fiance's 2005 SIenna and the ac compressor will not come on. and ships from Amazon Fulfillment. A week ago the AC stopped working so I assumed the charge was low and purchased a kit to recharge (never been recharged). FREE Returns . apply 12 volts direct to fuse and clutch engages. Everything blows cold and refrigerant is charged. no power on ac clutch relay fuse. In the relay box the relay for the AC is a 4 pin. ’ Here are the most common causes: 1. However, pulling that actually cuts power to the blower. Did some probing and discovered that the AC switch is not sending a signal to the relay to turn the compressor on. Put A/C gauges on the Hi/Low pressure side. (Image source: IXYS) Customer: No power to ac compressor . 00 of items shipped by Amazon. any tips before I buy a new one? Ye jumping the ac clutch relay didn't do anything which kinda makes me think it may not be the climate control The air conditioning compressor relay supplies power to the compressor for AC function. There is a relay inside. Showing where the trailer turn/relay lives - not seeing anything about an AC relay. ive checked averything in the hood and in the dashboard fuses wise, took it to midas and they didnt find **** i was told to disconnect the ground for 20 sec and connect that would reset the ac system but that also didnt work. Pricing. Turns on? Good pull the jumper and install the relay. 14,974 Satisfied Customers. The Normally Closed and Common terminals are disconnected. Chevrolet Technician. I replaced the compressor relay and the AC temperature control module and the behavior is the same. 6l with manual climate control. When the Sedona is running with the AC turned on there is good DC voltage on the relay plug-in to feed pin 86 of the relay. Then it went to an AC shop to be leaktested and charged. With a test light, ignition off, the AC relay should have one ground and one power. In a 1994 Chevy K1500, the compressor should receive power when the AC button is turned on, assuming that the system is adequately pressurized and there are no other issues preventing it from engaging. Jump to Latest I have checked 1 fuse and 1 relay in main fuse box both good. In the past she would have issues with the AC compressor not coming They say it's in the IPDM (intelligent power distribution module) under the hood. Check that, then run a wire. No power to AC Clutch. 3 4. Clutch won’t engage. 5, I tested the relay but there’s no power to it put the compressor clutch relay in the high beam and they work so I’m guessing the relay itself is good. The connector was a There was voltage at the A/C cutout relay (but the relay was NOT activated), so I concluded there was an open circuit somewhere between the relay and the compressor. But its not like this can't be figured out without the dealer, I assure you it can. Arrives before Christmas. Everything in the control circuit is working fine. 3 out of 5 stars 14 ratings | Search this page . Checked power at plug, nada. No power to my ac relay for the compressor, no blown fuse. in cab controls work power to purple wire. 00 $ 47. I just finished replacing the front evaporator, desiccant, ect. Under hood driver side by firewall I have 12v power to AC relay pins 1&3 as needed and ground is being sent to relay pin 2. The Normally Open and Common terminals are connected. both low and high pressure switches jumped. On a friends E I have bypassed that switch just long enough for a diagnostic test. The Cummins has it's week spots just like any other make, one of them is that TIPM. It seems there is no power getting anything. If this is not the case, then there is a compressor pressure switch that is used to detect pressure in the A/C system. Anyway Hey Guys i have been searching for a while and cant seem to find exactly where my issue is. maybe the other fuse is bad that supplies power on 2nd leg of the relay. Related searches. Checked continuity of wire between PCM and Relay - good. The fault was in a connector that brings the hi/low pressure switch wires into the main harness. 1 clutch will not engage, checked relay and power is correct, replaced relay still no power to the clutch cable. Now we know that side of the relay and wiring is ok. I have replaced the blower switch, still no power. Can?t figure out why I?m not getting a ground signal to close relay in!!?? Ac on max full speed, low and high Got a 2007 f150 ac clutch not engaging No power to the relay jumping it does engage the ac, AC, 77,000, Yes i have a. relay works when jumped. Ok that is good. 3 has no power with key on or ground 5 has 12v with key on whether ac is on or not Customer: International 4300 Dt466. I confirmed with a multimeter there's 0 volts at Customer: Have no power from relay to ac clutch. Checked Freon and leakage and everything is fine. Next step is to check for 1999 - 2016 Super Duty - HELP - No power to AC Compressor - Looking for some help! I have a 2002 F250 V10. There is a fuse F1. Went to try the A/C no power to compressor. A/C was not working, I determined that the compressor was bad. If OK, go to Step 2. can also prevent A/C compressor from powering up. 8 20amp in the same under hood fuse / relay box ! If you pull the relay out of it's socket an look on the bottom you'll see some numbers , 30,87,85,86 ! 85an 86 are the control side of the relay an 30 an 87 or the load -fan side ! Customer: No power ac relay only on 87 Ford F650's A/C wiring Mechanic's Assistant: I'm sorry to hear about the issue with your Ford F650's AC wiring. My question was about the AC clutch relay, not the "compressor". If I jump 28 AC to Y, condenser turns on fine. All other switches turn the relay on/off, so the first thing I'd do is make sure the relay has power and then jump to top make sure the clutch comes on. System Controller 4008 Blue, Lights and wipers work fine still no power for feed on AC Power on blue controller terminal. Please help! I live in Texas and it's so hot with no AC. 4. Check for power and ground. Need to locate ac compressor relay on freightliner have no power at thermostat but power at switch on panel control vin Can not locate the ac compressor relay, im try to locate the relay, maserati quottoporte gts 2014, i just looking to. I am getting NO voltage at the MAG Clutch relay. When I flip the A/C switch on the dash the A/C relay contacts engage. The ECM and HVAC module rely on I noticed it didn't click when removing or installing with the A/C on which made me think there was no power getting to the relay. No Ac. 0:15 . I checked for 12v across the two leads on the plug that Buy AC Relay ACVN51212 Japan Original Part Number 39794-SDA-A03, G8HL-H71, 4 Pins 12V 20A Power Relay Assembly Honda Starter Relays Fits Honda Accord Civic CR-V: Starter - Amazon. • The LAA110 contains two single-pole, NO (1-Form A) relays, each rated for 350 volts/120 mA (AC or DC), and is available in 8-pin DIP, SMT, and flat pack housings (Figure 3). If you have power at the ac relay then you need to check the wire between the ecm and ac I've not heard of a power module needing reset for no reason, but maybe. Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? Customer: Its constant, I have power at the 3 pin on the relay, always hot, but the relay won't close and send power through the 5 pin to the clutch Mechanic's Assistant: What is the model/year of your Ford? Very interesting. General purpose and power relays are electromechanical relays that use input signals and low voltages to control larger circuits that power machinery No power at low pressure switch, Dark blue wire, other wire, black, does have ground. Ac compressor has no power at plug. I confirmed with a test light that the A/C relay is getting power from the fuse on the two pins where it should, pins 86 and 30. Feb 4, 2009 0. That also did nothing. Now you need to focus on the control side of the ac relay. voltage at the cavity for relay terminal 30 at all times. Wires from t'stat to control board are good. Jumping the clutch from the magnetic clutch relay with the engine running engages the clutch and I get cold air. two going to the hih pressure switch in the back of the compressor. The AC compressor relay is no different then other electrical relays - its electrical contacts will eventually wear or burn out, and the relay must be replaced. 2005 Chevy Express 2500 4. The other two wires go thru the diode to the AC clutch relay. Compressor doesn’t come on tested with ac on Customer: No Power to AC Compressor, fuse and relay under hood are good and have power. We jumped the high pressure switch signal and power and the compressor didn't come on . We also jumped the hps ground and signal and still no power at ac compressor . 9 Cummins There is no relay. Mechanic's Assistant: Are you fixing your RV yourself? What have you tried so far? Yes, changed relay, and verified fusses were G9TA and G9TB AC power latching relays offer 60A and 120A switching capabilities in compact designs. Figure 3: The LAA110 from IXYS is a basic two-channel SSR with two independent inputs and their respective NO outputs. I have checked the AC Clutch relay (#30) as well as the AC Clutch Feed fuse (#47) and both of those were good. 6 LMM duramax Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? Customer: Considtent Mechanic's Assistant: What is the model/year of your Chevy? Customer: 2008 2500HD Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? You should have unswitched power at pin 30 of the relay, ground on pin 85, and your pressure switch circuit and control head will apply power to pin 86 when the AC is turned on. checked the mini sensors on air dryer connections look good. 2002 f250 7. I vacuumed the system. Sold by Electronics-Salon. When this is done OONO DPST 1NO 1NC 8Amp Power Relay Module, AC/DC 12V Control Voltage. A/C relays are electrical switches that carry electric current from one component to another within your car’s AC circuit. The aircon on my 2006 prius does not work. Thats all that switch does in the cab is ground that 87 pin. Get it as soon as Tuesday, Jan 28. No power to AC compressor. No noises are being made from anything and the AC light button does not come on. BY just swapping relay, you do not know if the BCM is energizing the relay. Lol . 2 out of 5 stars. + Electromagnetic Power Relay, 8-Pin 10 AMP 12V DC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY2NJ [Applicable for DIN Rail System] Not getting power to the ac clutch. 7 Cummins and having air conditioning issues. Electrical Overloads: An electrical overload, or a surge, can cause the relay to blow. Return this item When I flip the A/C switch on the dash the A/C relay contacts engage. Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far? Customer: )yes I have put in new relays, checked fire to pins 86 and 30 Customer: Second opinion] No power to the ac relay under hood distribution boxMechanic's Assistant: Is the power loss consistent, or does it fluctuate? Customer: consistent no power to ac clutchMechanic's Assistant: What is the model/year of your Chevy? Customer: 2003 gmc sierra 5. When switched on nothing happens, no relay click, no noise, compressor stays quiet. 02v and . We have the system full of freon and the system will produce cold air when we jump the relay. The clutch is powered directly through the Customer: No power to ac compressor, all fuses are good ac compressor relay is not kicking in. The AC amplifier is supposed to normally provide ground for those two relays, and if that circuit is broken or the AC amplifier does not function, the fans go to high speed continuously. Well on the relay the enable worked (turning the relay on) but the supply was dead. Turn on ac and no fan. switch jumped out, manually jumped out relay and clutch engaged Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? Customer: Never Mechanic's Assistant: What is the model/year of your Chevy? Customer: It has refrigerant Mechanic's Assistant: What year is your Chevy? Customer: 04 Mechanic's Assistant: Are you Customer: No power AC compressor clutch, can jump relay to get it to turn on. If the relay clicks when the A/C is turned on, this does not mean that power is flowing through the relay, it only means the relay is receiving electrical power. There should Customer: A/C compressor clutch relay not sending power to A/C clutch. However, when they bypassed the connector and gave the compressor direct power, it turned on. In my mind I only have three other possibilities. I recall looking at the factory diagram and there was no relay or fuse/ Any place else to check for power? dealership parts dept shows no ac relay either. Checked all relays. Sort by Oldest first Oldest first Newest first Most reactions. The blower works fine but it blows hot/outside temp air. I thought it might be a fuse or relay but No power to AC compressor. Flat rate pricing based on labor time and parts This allows power to flow through the relay to the compressor clutch, turning your A/C on. Let me know. Ohmed wire from relay to pressure switch checks out good ohmed wire from relay to controller checks good and other 2 I believe I can use the onboard relay drivers to control the existing WOT Cutout Relay. When the relay senses at least 90VAC, the relay trips. This component is connected to three wires, including the ground wire, the control board’s input wire, and the power feed wire to the AC compressor clutch. (2) The relay normally closed terminal (87A) is not used in this application. The air condition relay is dead, no power to any of the wiring to this relay. Also used power probe at clutch and it worked. Thinking bad info in, bad info out. Customer: Got a 2007 f150 ac clutch not engaging No power to the relay jumping it does engage the ac Mechanic's Assistant: Is this the first time you've had trouble shifting? How old is the transmission? My 1999 379 had no power to the ac compressor clutch when I bought the truck. If you install the paper clip TEMPORARILY and the compressor runs, you can eliminate everything that powers the compressor and the compressor clutch and start looking for why the BCM does not energize the relay. IanG, Sep 27, 2015 #6. Reply Like #7 05-14-2020 | Recently bought truck 1998 silverado z71 4x4 dually. Were is it hidden the ac relay on 2oo4 nissan titan 5. p. Tested all fuses in can & Outside fuse/relay box. 00. NO POWER AT AC COMPRESSOR Please advise on precise fuse and relay locations to check By chatting and 09 Honda Odyssey. This item: Electronics-Salon 1PCS Dual SPST-NO 10Amp Power Relay Module, AC/DC 24V Control Voltage. Zlirfy 2 Pack AC Relay,AC and Starter Relay,39794-SDA-A03 39794-SDA-A05,A/C Fan Motor,Head Lump,Multiple Use Relay Plug,4 Pins Power Relay Assembly Starter Relays,Firs for Most Model of Cars 4. I checked the voltage at the pigtail for the compressor and I have zero volts. Used power probe to make sure wire from fuse box was good, and it was and made sure I had a good ground. If you suspect the relay has failed, it should be tested prior to replacement. The associated relay is the forward-most black one in the underhood fuse box. Dryer is incorporated in the condenser, I can not seem to find any pressure switches. Literally everything works and up to snuff, compressor and all other components replaced within past 2 years, system at max charge, there's just no power going to the compression relay. Low pressure switch is new. A/C freon charge low, pressure switch problem, etc. 8,063 Satisfied Customers. This makes sense since there's no power coming from the relay to the diode. C3 Tech/Performance - No power to ac/heater blower - I have checked the fuse box (Fuse ok). Mechanic's Assistant chat. is there a relay that could be out? Answered by Chris in 10 mins 14 years ago. BTW I can still jump power to the compressor and get it to power up. Uvan. tried it yesterday - no blower fan and outside condenser did not turn on. and evacuated and started to recharge. Have installed new dual climate control panel. The relay is not getting the ground signal. Replaced pressure sensor on high pressure line and still nothing. Thread starter blazebolt; Start date Jun 14, 2007; This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. Ask My Aut Hi Mark, if pin 26 has 12v and pin 85 is ground, then the relay isn't switching on. there is an electrical plug on the ac compressor, curious if you can check for power there because if there is power and the clutch isn't engaging, then the compressor is not working properly. Have you checked the fuse for the AC compressor in your Grand Marquis? Customer: I am not getting any power to the ac clutch relay. 1st warm day here in Michigan and go to turn on ac. AC/clutch relay is a much more common failure point. You said you're not getting power to the AC relay, even though the fuses are good. The ECM and HVAC module rely on plausible inputs of both switches to allow the ECM to switch a ground to the AC compressor relay to allow the AC compressor clutch to switch on. 3L Power Stroke Diesel - Not getting power to A/c compressor - New a/c compressor/ new high low switch sensors, all fuses ok, can get power to a/c compressor if I jumped the a/c clutch relay. Theres no power to the ac relay. 3 out of 5 stars I put a meter on the fuses inside the car with switch on and both get 12. 7,740 6,163. FREE delivery Sat, Dec 21 on $35. I'm about to take the switch off and check the pins to Low refrigerant pressure can cause the AC relay not to be activated. Part 1 of 2: Locate your A/C Now all I get is hot air. SInce compressor is not running, both read the same and it is at 100psi. Power is at switch on dashboard, but can't trace power past switch. I have no continuity to ground on any of the other plug-ins. 150. Swapped out starter and A/C relay, no power to compressor ?? 2006 honda odyssey AC not working. So, the relay clicks on, but the power isn't going through. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix with Ford. Will AC clutch engage if low on Freon? No, if the Freon level is too low, it will not engage the AC clutch. c. Dual SPST-NO 10Amp Power Relay Module. First pull the AC relay and jump across the terminals to turn on the compressor. $47. Checked two wires that feed from HVAC Control module with pick light, im getting ground at pin A12, same Dark blue that wire that goes to low pressure switch but neither power nor ground at other end, this doesn't change if AC button is depressed. looking for a wiring diagram. After about a minute or so, it will start right up. Manual control. no power going to the compressor, jumped pressure switch which did nothing. 6v when unplugged and 0v when jumped as it should. as far as No power to Compressor. + Dual SPST-NO 10 Amp Power Relay Module (AC/DC 24V) $15. I confirmed with a test light that the A/C relay is getting Low refrigerant pressure can cause the AC relay not to be activated. worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling Tested all fuses in can & Outside fuse/relay box. Mechanic's Assistant: What's the make, model, and year of your car? 2014 Buick Regal 2. 3 pickupMechanic's Assistant: Are you fixing your Sierra Customer: I have no power at the a. Have you tried a new relay? Based on your test, pins 87 and 30 should be completed sending power to the compressor. Heavyd Road Train Member. When the technicians went to test it they told me that the compressor was not turning on. In Stock. When the AC system demands more electricity than the relay can handle, it may cause the relay to overheat and fail. Next I went looking for the AC relay . I tested the socket and found no signal power. It runs when you jump those two pins, so the same thing should be happening with the relay being powered. Can add power to fuse AC works Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? Customer: Consistent Mechanic's Assistant: Are you fixing your Relay yourself? What have you tried so far? Customer: New control panel inside. I was hoping it would show why there is no power to the AC clutch. No power at a/c compressor. EricFromCT | Car Specialist. We have ground at the compressor . Ok, the air condition relay is a bit tricky. What wires from switch take power to the compressor. 1999 - 2016 Super Duty - No Power to AC Compressor - Just installed a new AC compressor and recently took off my dash to get to the HVAC plenum. 3 no power to ac relay. HOw do I test the underhood relays? I see that there is a resistor in the rear AC. superado Posts: 6 Joined: Tue Jan 05, 2016 4:38 pm. Suggest to check live data in the ECM for AC pressure switch and live data in AC control module (HVAC). The BGB does not have a test procedure for the AC amplifier, but you can figure out the normal state from the circuit diagram and check the terminals for No power to AC Relay. controls unit is good. There’s power to the fuse but no power to the A/C clutch. So I checked the voltages to the relay and one of the same relay type (the horn) to see where the enable and where the 12V supply came in. Top. The relay tested fine. This relay should be replaced if it's proven to be faulty. I have checked the two fuses and they are fine. I have no continuity from the AC 20amp fuse and the coil or control side of the magnetic clutch relay. Honda Odyssey EX-L: 2006 Honda Odyssey EX Customer: No power to ac clutch l. I did the obvious and tested the fuse and relay (even put a new relay in), but still no power to compressor. Condenser Fan Relay not getting ground either (grn wire) from PCM. EricFromCT. 1438 posts here is a link to the wiring diagram, Your to have 12 volts to 2 terminal at the Ac relay. so what is Remove the relay and you should have power on 2 slots in the fuse box. 4L. Basically, if my car was off as compared to running it would look and sound the same when I try and turn the AC on or mess with the switches. Mechanic's Assistant: The Ford Mechanic can find the right wiring diagram for you. Members enjoy round-the-clock access to 12,000+ verified Experts, including doctors, lawyers, tech support, mechanics, vets, home 1968-Present E-Series Van/Cutaway/Chassis - No Power to AC Compressor - Hi Everyone, I'm troubleshooting an A/C issue on my 2006 e-250 5. Ok I believe that the relay you are powering is not the ac relay or the wiring is different since the ac relay is connected only to the compressor irhapsody Relay 200A, 12V Continuous Duty Relay, 4 Pin Starter Relay, Spst High Current High Power On/Off Control Relay, Split Charge Relay Switch EPLZON NT90-AC120V-10X Power Relay AC 120V Coil 120 VAC 30A 40A SPDT(1NO 1NC) with Flange Mounting and 10 Quick Connect Terminals Wires Mini Relay(Pack of 2pcs) So far I have tested the relay and fuses and have tested/jumped the high and low pressure switches; this included testing the low pressure sensor wire at the HVAC controller which gets 4. My A/C compressor clutch won't engage. I turned on the AC and pulled and reseated the relay and could hear it clicking on. The ac hasn't worked since I've had the truck. Switched out PCM with another used PCM - no difference. I reinstalled the compressor and went to recharge the system but I don't think I'm getting power to the compressor. The AC clutch is controlled by the air conditioning system, which often controls a relay that is activated to send 12v power to the AC compressor clutch when it should engage. So if everything from the relay to AC compressor works and the AC light in the cab is lighting up, then theres something in between thats not there. Should be simple to do. 5, I did the same under the hood for the compressor clutch FUSE and it gets 12. Then I found the relay and pulled it. You've tried replacing the relay, but it's still not working. Control voltage / Pull the relay and see if the terminals on it are loose or damaged. Mechanic's Assistant: What's the make/model/year of your truck? Engine type? Customer: 98 Peterbilt 379 with a E model cat. When there is no power, the Normally Closed and Common terminals are connected. The PCm ground the relay to activate it from signals from the control panel. Not getting power to the Compressor and no power @ the relay - Compressor works and blows cold when jumped. 5 - 1997 7. If i apply 12V to the compressor from out side source everything works fine. This is an older thread, you may not receive a response, and could be reviving an old thread. I checked the system and found that I had no ground to one side of the clutch relay. no power to them as No power to the compressor could be low refrigerant, bad pressure sensor, bad ac clutch relay, bad HVAC/climate control module, or bad PCM. If you are not getting a ground at the relay when turning the AC on then you need to go to the pressure switch and check it. 4L, with front A/C only. The Ford Mechanic I'm going to connect if yes, low/no freon isn't the issue. At first i thought it was a simple clutch but as i go deeper im not getting any power to the connector or at the relay the fan kicks on but not the ac clutch any help would be invaluable for my sanity. Learn a common a/c problem on how to fix the Air Conditioning on your Honda Pilot, Honda Odyssey & Honda ACCORD. Mick Z. Thread starter donald; Start date Aug 5, 2022; Aug 5, 2022 #1 donald Registered User. AC Charge is good in. Compressor or at the fuse. Power on 3 of the 4 prongs of relay. Go to Step 3. The rear AC fan in my '99 Safari has stopped working. The pressure sensor sends signal to PCM, then the PCM sends signal to the TIPM or total integrated power module which is sort of self contained fuse box but really a micro computer that controls many things. 00 $ 15. No ground from PCM to Relay (Red/Blu). Is there another fuse or relay for the ac compressor itself? Wiring diagram? Customer: No power at ac compressor connector Grand Marquis Mechanic's Assistant: Im sorry to hear that youre experiencing a lack of power at the AC compressor connector in your Grand Marquis, but the Mercury Mechanic will be able to help you diagnose and resolve this issue. Hello, I am in need of some help getting my AC compressor to work on our 2002 Escalade. 152. Getting HOT air out my vents with the A/C ON. ol turbo 2008 silverado ac not engaging. Without this relay, the AC compressor will not have power and the AC system will not function. Pump works when hot wired any other known problems with the AC turning on button on the dash seems operational can’t find a wiring diagram that shows the location it does show a relay in the loop any help appreciated 5 - check for ground (with A/C on, PCM supplies this to energize relay) 1 has power all the time 2 obviously works cuz the ac will run heres my problem. Charge is good. I have swapped the actual HVAC controller with one I know works and still cannot get power to the AC clutch. Mechanic's Assistant: What is the model/year of your RV? 2004 revolution. One is the high power blower relay(I checked for continutity and received current from the upper posts but not from the lower) I have a 2013 Ram 2500 with a 6. So basically fault code P1536 is what we knew already - no power to the AC clutch. 2009 Ford F150 Lariat 4X4 Custom Edition, 5. 9v, . 99 $ 8 . I jumpered the relay contacts, the AC clutch engaged and I Customer: Have a 2021 ford f150 that ac does not work. Power is normally routed straight through it from 30 to 87A 2. Wayne. No cold. That listing is for the fuses No power to fuel pump and relay is good, consistent, 2000 chevy silverado, yes replaced relay and fuel pump, not that i david craig | owner/mechanic at 3D Automotive 40,482 Satisfied Customers A: The power switch is a circuit breaker. Customer: no power to ac compressor and clutch after replacement. No power to high pressure AC switch, NO the compressor is not engaging Applied 12 volts to If the AC/clutch relay not switching on, will it still get power? Why do you even need to check if a fuse is hot or not? Suspecting wire damages? Check fuses for connectivity. There are a number of reasons why your AC relay may fail or ‘blow. 2004 - 2008 F150 - Help with ac compressor not getting power - I have a 2007 Ford F150 4. Mechanic's Assistant: Is it just the A/C, or are you also having issues with the heating? Do you see any coolant leaks? No leaks,just ac everything is brand new. Both are good. I have a tester am I am getting power there. Without an A/C relay, your car’s AC would not be able to function properly because the If no power then check the relay it is a 4 pin relay so the relay gets a ground on the dark green white wire on pin 86 so that the relay gets activated and 2 powers should be on pins 85 and 30. WOT relay is a 5 pin relay, when relay is OFF the 12v from pressure switch passes thru this relay and to the AC Clutch turning it ON When Computer sees WOT by driver it activates the relay turning OFF AC so driver has maximum power to pass or accelerate, when driver lets off the gas pedal then AC will come back on DIN Rail Mount AC/DC 5V 12V 24V SPST-NO 5Amp Power Relay Module (AC/DC 5V, 8 Channels) Visit the OONO Store. I have checked the volts at the High Pressure switch and had readings of 4. How It Works. AC compressor RELAY replacement. If I jumper pin 3 to pin 5 on the relay the compressor clutch will engage and blow ice cold air and 134a level reads good. 2011 Chevy truck no power at AC fuse. The fuse is good. If all of those check out, it could be between pin 87 and the compressor clutch. Add to cart-Remove. View More. They said the wiring connector was not receiving power. There is a cooling fan relay in the under hood fuse / relay box . The ac pressure switch is next to the power steering reservoir , Hello I will help you with your question. couldn't find one? Started reading that on these trucks the Heater relay does the AC and the blower. checked relays and fuses relayed to the hvac. However, when you connect a hot wire directly to the AC compressor, it does turn on. AC 208-277V 240V SPST 20Amp 250Vac/30Vdc Power Relay Module, Plastic Enclosure Okay, you have power at 30. I noticed that the clutch is not engaging. com FREE 1994. Let's start by checking the wires behind the AC relay. If not OK, repair the open circuit to the fuse in the PDC as required. Part number: F-1001/12V. 2004 - 2008 Ford F150 - 2008 f150 no power to ac compresser - I recently bought a 2008 f150 4x4 when I bought it the ac did not work now I'm trying to get the ac going the compressors not engaging so I checked all the fuses and relays I put my gauges on it and it's got freon in it I jumped the low pressure switch and Neither the front row control module or the second row AC will have any power to it. The last two are unlikely but are possibilities. It will ground it and activate the compressor once it sees the correct signal from the sensor for high and low Electronics-Salon 1PCS Dual SPST-NO 10Amp Power Relay Module, AC/DC 24V Control Voltage. Nothing. the problem "appears" between the fuse box and the Control Panel. Joined Nov 25, 2015 Posts 26 Reaction score 5 Location Unity Or. It's got a full charge, and the pressure switch works because the condenser fan turns off when I unplug the pressure switch. Looked and sure enough , ac compressor isn't engaging. Ive seen a bunch of those go bad. Please consider creating a new thread. This is if you are sure it has the proper amount of If the refrigerant is low, a low pressure switch will signal the PCM not to provide power to the fan relays or the compressor relay so the standard AC on, 2 fans spin, test is meaningless. No power to ac condensor fan. I have however seen a bad power module cause no a. Electronics-Salon 1PCS Dual SPST-NO 10Amp Power Relay Module, AC/DC 12V Control Voltage. 99 Get it as soon as Friday, Mar 28 Customer: 2018 international 4300 no power to the AC clutch the five amp fuses good. Supplies and solutions for every industry, plus easy ordering, fast delivery and 24/7 customer support. Pin-10 is used as a sense to determine when the Clutch Cycling Pressure Switch is closed. system is charged. This allows the power to flow through the circuit in a controlled manner so that each component can be turned on or off at will. Is this a similar issue? Thanks for any tips! Tom When it comes to 12V AC General Purpose & Power Relays, you can count on Grainger. 24v relay Customer: Need help. | Expert. Save Share Reply Quote Like. Entire ac system is new, including high pressure switch and The AC compressor relay is responsible for supplying power to the AC compressor and clutch. Working on a 6. Mike Mcmillan | Volvo/Mack Master Tech, Certified with Cummins, Eaton SOURCE: A/c compresor quit blowing in 2006 Dodge Ram 2500 Diesel 5. 87 goes to the compressor. The only fuse I see labeled "ac" is under steering column. If you are low on freon, or this pressure switch is bad, the A/C compressor will not cycle on/off (pressure I've tested the clutch connection from the alternator during the active auto test and there is no power detected perhaps a few millivolts, but not 12v for sure. The initial problem, which should have been found by the Nissan service dept, was a faulty AC relay in the IPDM, which required replacing the IPDM No power to the ac compressor. The ECM grounds the control side of the relay or terminal 86. Can jump relay AC works . Compressor is not running. That is the only plug-in with any DC voltage. How it works. I have checked and no power is going to the wires supplying the pump. The same applies if the freon pressure is too high. . Quantity: a lot of 1 piece. By jump the relay I mean remove the relay and connect a paperclip across the ac relay terminals. Any ideas where to look While simply replacing the relay seems cheap, fast, and easy, the result is normally just as cheap. compressor and that works. Have power to relay, compressor. $15. I''ve had to replace and rewire the relay for the front in order to regain the high speed blower control.
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