Chevrolet Silverado 1500 / 2500 / 3500:

A/C Sitch on dashboard not turning on compressor

You are not logged in.

#1 3/27/2015 2:21 AM

herbie
New member
Registered: 3/27/2015
Posts: 1

A/C Sitch on dashboard not turning on compressor

When fixing the air condition system on the 1999 Chevy Silverado 1500 4.3L, i bridged the fuse box to get the compressor on. The compressor now comes on from bridging the fuse box, but I cannot get the compressor to turn on by the a/c switch on the dashboard.  The a/c switch on the dashboard lights up, but the compressor does not come on. How can I fix the problem?

Chevrolet Silverado 1500 / 2500 / 3500 Recalls, TSBs and Service Information >> ALLDATA

Offline

 
Sponsored Links
ALLDATAdiy.com

The Leading Source of Professional Diagnostic and Repair Information.

#2 3/27/2015 12:02 PM

TechHelp2
Administrator
Registered: 11/24/2009
Posts: 1299

Re: A/C Sitch on dashboard not turning on compressor

When you use a jumper wire to make the compressor come on does the A/C system get cold? The reason I am asking is you can jump the compressor to engage even though the system is low or empty of Freon.

There are a lot of reasons the compressor won't turn on; there are pressure switches, relays, fuses, control modules and the PCM that all work together to make the system work. The A/C system also needs to be fully charged with R134a Freon to work properly.

I am giving you a schematic of the compressor electrical circuit I got from the Alldata automotive information website to help you locate the problem.

If you need help get back to me and we can go over your results to diagnosis the problem further.

https://www.realworldautomotive.com/forums/uploads/thumbs/174_79212358.gif


realworldautomotive.com
car and truck information like nowhere else
Chevrolet Silverado 1500 / 2500 / 3500 Recalls, TSBs and Service Information >> ALLDATA

Offline

 
E-mail Page
Print Page
Save or Share Information
ALLDATAdiy.com is the leading source of factory diagnostic & repair information specific to your car.

Powered by PunBB
Copyright © 2007-  RealWorldAutomotive.com

Save or Share Automotive Information
Custom Search