Automotive Air Conditioning Information Forum (Archives)

Provided by

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

no power to ac clutch

crabbytom on Wed June 17, 2015 11:29 AM User is offline

Year: 2000
Make: chevy
Model: silverado
Engine Size: 5.3
Refrigerant Type: 134A
Country of Origin: United States

No power at ac clutch connector. All fuses and relay"s ok. My son tried to add refrigerant with kit so I can only see' low pressure . If high pressure is off will PCM shut off power to ac Clutch? Tried to jumper from battery to ac clutch but no engagement. Removed pressure switch and used jumper wire/ no clutch engagement.

Jag987 on Wed June 17, 2015 5:37 PM User is offline

I might be confused, but it sounds like there are two problems going on here. First, the connector going to the compressor does not have power to it correct? With the ac on, does a test light or volt meter show any voltage? Second, with a jumper going right to the compressor (and another jumper to ground it?), the clutch does not engage. This tells me the clutch coil is likely bad.

I bought a can of 134a at w**-mart that had a stop leak, oil, and dye in it. It also had a hose and a gauge, so now I'm an AC pro!

crabbytom on Fri June 19, 2015 4:03 PM User is offline

I finally got power and ground to ac terminal but clutch would not engage. I Figured this indicated that I needed a new ac/clutch. Installed new clutch and compressor have power to connector and ground is good. Clutch still doesn't engage. Its hot!!!!! Think I'll take a break today and start all over tomorrow pulling vacuum and see if tomorrow brings new luck. Thanks for the reply.

Metal Man on Sun June 21, 2015 8:26 PM User is offline

If you have 12 volts ran directly to the compressor plug you either have a bad clutch coil or too large of a clutch gap. Try tapping on the front of the clutch to see if it will engage.

Edited: Sun June 21, 2015 at 8:28 PM by Metal Man

Back to Automotive Air Conditioning Procedures, Tips and FAQ.

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.