Pontiac Problems? Ask a Mechanic for Answers ASAP
What year, model, and engine size do you have?
On that model it definitely sounds like a shorted AC clutch coil. Yo have a multi-meter I assume?
You should check resistance across the connector of the clutch coil. It should be open or OL on your meter.
If it's not, let me know what reading you get.
Ohms, test from pin A to B on the compressor connector.
This diagram is the pigtail side, the compressor side matches it, across the two pins you should see OL. If you see 1, or any reading really, that means the clutch is shorted on.
The easier way to test it would be to unplug the compressor clutch and see if the fuse still blows.
If it doesn't blow, then the clutch is the problem. If it does blow then you will need to check for resistance (ohms) from ground to pin B on the pigtail side. If you get anything other than OL or more than about 20 ohms of resistance then that wire is shorted to ground (rubbed through) somewhere between the clutch and the relay.
Let me know how it turns out.
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I just wanted to check and see whether you needed any additional help on this one.
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