Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Can you tell if you are getting 12 volts at the A6 pin of the compressor clutch relay in the under hood fuse box?
It should be a dark green wire. Also check for 12 volts at the 10 amp "A/C Comp" fuse.
Sorry, we're really swamped here at the shop and I'm not available for a phone call. Here is the diagram I'm looking at for this one:
You should have a diode in line with the AC clutch circuit. If you have 12 volts at the fuse and the dark green wire that leads to the clutch then either the diode is bad or the dark green wire leading to the ac clutch is broken somewhere.
Also, the ground at the black wire of the ac clutch should be good as well. You don't have 12 volts at the dark green on the compressor do you?
No, it's not common to go out; that's why I would check for 12volts at the green wire at the compressor clutch first. The diode is part of the engine harness, approximately 20 cm (8 in) from the A/C compressor clutch connector-according to GM.
The dark green side should have 12volts. The black side should have ground. Then test across the diode with your meter set to resistance (ohms) and you should see OL with the leads hooked up in one direction and 1000 to 10 mega Ohms in the other direction.
Can you check for 12 volts at the IGN E fuse?
So you have 12 volts at B6 of the relay (dark green with white stripe wire)?
Nothing at A4 (pink wire)- with the relay plugged in?
Ok. That's good. 12 volts on the orange wire coming from the AC fuse right?