Thread: A/C Compressor Short

Thanks for all of your help gtpleslie. Instead of attempting to jump the compressor, I simply unplugged the harness and tested for current with my multimeter. There was no current, so the issue is electrical. The a/c clutch fuse is blown, so that could be why I'm not getting any current to the compressor. How can I fix the blown fuse to be able to test for current to the compressor accurately? To narrow the issue further, I checked for current on the pressure switch. It is a three pin connector (one signal wire, one ground, one power), and my multimeter read 5v, which is correct. This tells me that low refrigerant is not the issue. I found a couple youtube a/c troubleshooting videos with a lot of excellent tips. Here are the links.

Part 1 - YouTube - ‪A/C Troubleshooting(part 1)of 2‬‏

Part 2 - YouTube - ‪A/C Troubleshooting(part 2)of 2‬‏

Okay, so I removed the a/c clutch diode, turned on the a/c, and holy santa claus ****, the compressor kicked on and I got cold air. I couldn't find a replacement diode anywhere except the dealer, who had to order one in.

so without repacing the diode it still worked?? did you just pull it out and put a new fuse in it?? i traced all the wires down to my cluch and couldnt find any problems eather so im thinking that might be whats wrong with mine????

Yeah, to test if the diode was the issue and causing the fuse to blow, I just removed the diode and the compressor came on. Now, I'm just waiting for a new diode to arrive at the dealership.

I replaced the diode, and the fuse blew again. I'm just going to leave the diode out unless someone tells me that is a bad idea.

whatever is wrong with your car is the same problem im having. i have the diode out now and its working, but its not good to leave it like that it protects the compessor and other electical parts. they put it in for a reason so it is ment to be there. if you leave it out you could have a dead compessor in a week, or a dead car if it shorts and cooks the computer or a wire in the dash. you might be safe for a few times on the really hot days but i wouldnt run it that long without it. this week im going to rewire the compressor in hopes that maybe its just a bad wire and see if that fixes it. but keeping it out isnt the best idea.