Hello all. I have a problem with my AC on my 91 blazer s10. I am hoping it is not a shot compressor:banghead: Every time I would move the switch to AC it blows a fuse...My Q. is. Is there a way to check to see if my compressor is bad or locked up?
Thanks in advance.

Same thing happened to my AC fuse but i noticed it only did it when it rains hard. i tried messing with the wires by the fuse box and the wires by the brake booster and by the compressor and it stopped blowing it.

Hello all. I have a problem with my AC on my 91 blazer s10. I am hoping it is not a shot compressor:banghead: Every time I would move the switch to AC it blows a fuse...My Q. is. Is there a way to check to see if my compressor is bad or locked up?
Thanks in advance.

With out a amp meter it is hard to test, but a quick test would to be run a fused jumper wire to it.
MT

With out a amp meter it is hard to test, but a quick test would to be run a fused jumper wire to it.
MT

O.K. I might be missing something here. If the fuse is blowing IMMEDIATELY upon turning the switch on, that sounds like a short, and a bad one. Even if the compressor is locked up solid, the clutch is operated by way of an electro-magnet and should still work, making the Belt squeal like a stuck pig. The fuse may indeed blow, but would it blow immediately?

It is very possible that the magnet has shorted due to a rub or something, resulting in a compressor that won't spin, but this sounds too much like an electrical short to me. Like you said, A fused jumper wire would help to determine if the problem is at the compressor or somewhere else.

Inspect your wiring and connectors going into the compressor for shorts, bare spots etc. Sometimes those things end up touching the rotating stuff. If you don't see anything, you can jumper the positive side of the battery to the compressor with a fused wire. Use the same size fuse as in the fuse box that blows. If the compressor runs, look for your problem upstream. If the fuse blows, I'm thinking the magnet is shorted.:2cents:

Sorry about the late reply gang. I was out of town. I will try the jumper with a fuse and see what happens. thanks a lot for the help guys. I'll let you know how it comes out.