87 GN AC WONT KICK ON

[richardv6]

CHARGED AC AND COMPRESSOR WONT ENGAGE..POWER IS GOING THROUGH LOW PRESS SWIUTCH ON DRYER AND FAN COMES ON WHEN AC SWITCH IS ON..I REPLACED AC RELAY SAME THING, I CAN APLY 12V TO DARK GREEN WIRE ON RELAY AND COMPRESSOR ENGAGES..THERE IS 12V ON BLUE WIRES,,GREEN WITH YELLOW TRACER AND PINK WIRE HAVE NO VOLTAGE..PINK SEEMS TO BE GROUND FROM BRAKE SWITCH FROM WHAT I CAN TELL BUT NOT SURE WERE SIGNAL COMES FROM TO ACTIVATE RELAY... ANY IDEAS FOLKS?

 

[ScottHeidinger]

http://www.gnttype.org/techarea/images/wiring_images/ac_heater_blowerswitch.jpg


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[richardv6]

YEA BEEN LOOKING AT THAT DIAGRAM FOR A HOUR.. I AM WONDERING IF PCM IS ISSUE

 

[richardv6]

DOES THE PINK WIRE FROM BRAKE SWITCH SUPLY A GROUND?

 

[ScottHeidinger]

https://www.turbobuick.com/threads/a-c-wiring-diagram.290054/

Looks like others have had similar issues there is another post with more detailed pics. I'm on my phone and can. Barely see these diagrams.


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[ScottHeidinger]

You have electronic or manual ac control?
Don't think pink is a ground but can't read this distorted chart yet.


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[richardv6]

Manual ac

 

[ScottHeidinger]

https://www.turbobuick.com/threads/a-c-issue.384730/

I think this will help you


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[richardv6]

Well fuse was blown. Installed one and blew again. Apparently got a short somewhere

 

[richardv6]

Thanks guys for help. I. Found it. Kept blowing fuse and I started unplugging stuff found egr module Smoking. Shorted internally. Glad I found it. Probly would have burnt to ground. Lol. First time I have seen that.