Golf&GM

iTrader: (20)

I can bench test my auto ride compressor and it will turn on. But when I install it in my 02 Tahoe it won't work. I've tested the ALC relay and it works as it should. And when I jump pins 30 and 87 I get 12v at the 7 pin air compressor connector at the back of the vehicle. So it's getting power, but best I can tell the 7 pin compressor connector isn't getting a ground signal. Does anyone know if the black wire on that connector goes straight to ground or if it goes to some sort of control module?