AC wiring schematic

[slipping]

I've searched site and the couple posts I found had dead links to the wiring schematics for the AC. Would someone who has please post? Thanks!

Oh and its a 99 Tahoe. W/ rear air

 

[_Dylan_]

this help?
http://www.diakom.ru/CAR/GMC/1997/Pickup K1500/SYSTEM WIRING DIAGRAMS/16204.pdf
http://www.diakom.ru/CAR/GMC/1997/Pickup K1500/SYSTEM WIRING DIAGRAMS/

 

[SunlitComet]

Amy particular part or the entire layout?

 

[slipping]

this help?
http://www.diakom.ru/CAR/GMC/1997/Pickup K1500/SYSTEM WIRING DIAGRAMS/16204.pdf
http://www.diakom.ru/CAR/GMC/1997/Pickup K1500/SYSTEM WIRING DIAGRAMS/

yes sir

Amy particular part or the entire layout?

entire layout. My buddy who is going through everything. Checked power to relay, to fuse, to compressor and all getting it but not to drier. Have switch turned on inside full on and ac clutch not kicking on. But if you give it direct power the clutch will engage but will not take refrigerant. So he wants a nice schematic and is going to pull a vacuum. Thanks guys!

 

[SunlitComet]

but not to drier? what exactly do you mean.

 

[slipping]

I was trying to get some pics (will do later) but the cylinder at the back on passengers side he said there is no power when he metered the plug. He said though that he's trying to get familiar with the system because he was a mech for mercedes.
Anyways, he also said he tested power with ground to chasis not to component. If my terms are not clear or right I apologize I'm learning as I go. We are going to revisit tomorrow(work gets in the way)

 

[SunlitComet]

Oh the accumulator. the swith on that is the a/c cycling switch. it carries no power but just switches a ground on and off really. it has a black/whita and dark green wire. you can disconnect its plug and jump the connector to see if you can get the clutch to kick in. if it does not work when shorted together or not then the problem lies elsewhere.

BTW which line is he feeding refrigerant into? the one pointing forward or the one pointing up (no no)? also are you saying it will not take it when the compressor is not running correct?

 

[slipping]

Oh the accumulator. the swith on that is the a/c cycling switch. it carries no power but just switches a ground on and off really. it has a black/whita and dark green wire. you can disconnect its plug and jump the connector to see if you can get the clutch to kick in. if it does not work when shorted together or not then the problem lies elsewhere

Ok. Cool. He did jump the accumulator wire (thank you) and compressor did not kick on/clutch did not click.

BTW which line is he feeding refrigerant into? the one pointing forward or the one pointing up (no no)? also are you saying it will not take it when the compressor is not running correct?

He fed refridge into fwd (I believe he said low side?) It will not take refridgerant either when the accumulator plug is jumped nor when direct power is applied. We sat like 5 mins and it pulled nothing from can.

 

[SunlitComet]

I would suggest you put a gauge set on there next to see if you are over or under charged. the high pressure cutt-off is in rear of compressor the low cut off should be on the manifold on top of it. if you want to try those as well.