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| Author | Topic: A/C question |
MIKE GATLIN                    POA Lifetime Supporter Prowler Junkie From:Flushing, MI |
posted 10-19-2019 08:38 PM
    
A/C was working fine this morning then quit this afternoon. Fan speed control works but no light illuminates when A/C button is engaged. Fuse in drivers side dash is fine as is fuse in the block behind driver side panel. There is no sound at the compressor indicating that it is trying to engage. I would love to hear your ideas. Thanks |
TucsonJer POA Site Supporter Prowler Junkie From:Tucson, AZ, USA |
posted 10-19-2019 11:44 PM
Maybe a shot of contact cleaner around the a/c button... Good luck Mike. Jer |
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MIKE GATLIN POA Lifetime Supporter Prowler Junkie From:Flushing, MI |
posted 10-20-2019 06:37 AM
Thanks Jer, sure worth a try |
ALLEY CAT POA Lifetime Site Supporter Prowler Junkie From:mesa, az, USA |
posted 10-20-2019 07:12 AM
Mike,,, No sound at the compressor? When that happened to me once, it was that the belt broke and was gone...
------------------------------------------------------------ Last resort if it comes down to not finding the problem: Auto Air specialists of Charlotte County This message has been edited by ALLEY CAT on 10-20-2019 at 07:26 AM |
mslc10 POA Site Supporter Prowler Junkie From:Bulverde, Texas, United States |
posted 10-21-2019 08:25 AM
found this: http://www.prowleronline.com/ubb/Forum2/HTML/005702.html
also by this you should check fuse 4,10,19 under dash, left panel. and also fuse 2 behind side panel under hood: This message has been edited by mslc10 on 10-21-2019 at 08:34 AM |
Tony Goertz POA Site Supporter Administrating Kat Personal ScrapBook From:Lucan1, Ontario, Canada |
posted 10-21-2019 09:56 AM
Hi Mike !!! Back in MI you wouldn't need A/C now ! If you are low on Freon the system will not come on. |
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ALLEY CAT POA Lifetime Site Supporter Prowler Junkie From:mesa, az, USA |
posted 10-21-2019 10:08 AM
quote: Doubt its a Freon related issue unless a refrigerant line broke,,,in that case you most likely would see where it leaked due to the refrigerant 'oil' sprayed onto surrounding areas. The exception would be if a leak is at or near the evaporator coil in the dash. |
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mslc10 POA Site Supporter Prowler Junkie From:Bulverde, Texas, United States |
posted 10-21-2019 04:13 PM
Mike says A/C light does not come on when compressor button is pressed leads me to believe it is a power, fuse, relay issue. I would pull the fuses listed above and re-insert them to see if they will reset the BCM that controls the compressor output.If you have a volt meter I would measure voltage to ground on both sides of fuse 2 in power distribution center behind left side panel. This message has been edited by mslc10 on 10-21-2019 at 04:21 PM |
Tomcal POA Site Supporter Prowler Junkie From:Commack, NY, USA |
posted 10-21-2019 05:22 PM
Try using the front defrost mode with temp control knob at max cool and fan in high speed. In many Chrysler products of that era this forces A/C on and overrides other sensors and controls. In many cases the High/Low pressure sensor fails. Sensor can be replaced without losing Freon. This message has been edited by Tomcal on 10-21-2019 at 05:23 PM |
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MIKE GATLIN POA Lifetime Supporter Prowler Junkie From:Flushing, MI |
posted 10-22-2019 07:11 AM
We are still on the road so I haven't been able to try everyone's ideas. Yesterday I discovered Tomcal's thought. Top was up and it was raining like hell so I turned defroster on. Before I could adjust it to warm, cold air came blasting out and that was a surprise. Where in the system is the pressure sensor? Seems like it must be on the compressor. I will post the resolution when I get it figured out. |
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LSK POA Site Supporter Prowler Junkie From:Asheville, North Carolina, United States |
posted 10-22-2019 11:41 AM
quote: The A/C pressure transducer switch is located behind the passenger side removable panel. Looks to be close to the firewall. The unit receives a 5 volt signal from the Powertrain Control Module which reads the transducer signal and powers on the compressor clutch thru it's relay. There is a wiring harness connected on it's end. This message has been edited by LSK on 10-22-2019 at 11:54 AM |
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Tomcal POA Site Supporter Prowler Junkie From:Commack, NY, USA |
posted 10-22-2019 03:12 PM
***** Updated wire color code ***** ***** Updated sensor location ***** Mike, Glad you had a chance to try the defroster trick. Replace A/C pressure sensor and your good to go. You will not lose any Freon when replacing, only a very brief puff of no significance. BE SURE TO INSTALL WITH A NEW O-RING. Sensor is located under the A/C compressor and slightly to the right/front of PCM computer on the smaller aluminum A/C line where it makes a "Tee. 14mm deep socket or open end/combo wrench. Three wires on connector. Violet/White tracer, Dark Blue, Black/Light Blue tracer. One last thought, try removing and reinstall sensor connector a few time to clean contacts. It could be just some oxidation on connector and not the sensor. You may have to fiddle around with the connector locking mechanize to get it off. Sorry your Prowler got rained on. This message has been edited by Tomcal on 10-24-2019 at 03:30 PM |
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MIKE GATLIN POA Lifetime Supporter Prowler Junkie From:Flushing, MI |
posted 11-05-2019 01:12 PM
A/C problem is resolved. I had no light in the a/c button and no a/c as a result. The button itself seemed suspect so I was able to replace the hvac control assembly (really nothing serviceable in it except bezel and knobs) and it did the trick. Thanks to everyone who contributed to the solution. |
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