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iTrader: (17)

Ok helping a buddy out with his suburban. Ac wont come on. Charge is supposedly good. Cant get info from tech 2. Checked all wiring. Trying to figure out if the signal out of the hvac module is power or ground currently showing ground. If i ground pcm signal wire to relay ac comes on. 3 different hvac heads and pcm's no change.

Video

Wiring info

strutaeng

I'm not well versed with AC systems, but what about those pressure switches?

Maybe one of them is bad? Not sure how you would check them though.

Also, it has been confirmed (by someone? the refrigerant charge is good?
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