Here is the fix to the Infamous Jeep GC Electrical problem
I am another owner of a 2000 Jeep GC that had the infamous electrical problem, but I found the fix finally!!!
I read all the forum titles here, tried everything but we still experienced the problem, until my dealer said I had a grounding issue. When you think about all the goofy things that were acting up, like the spinning gage needles, lights, windows, radio and air cond going on and off, the Jeep not starting, etc, etc, the one thing common to all of them is 'power',the BATTERY and the battery CLAMPS. When my dealer 1st told me I had a grounding problem, I simply tightened up the clamps and the problem went away for a few weeks. It came back tonight, so this time I took the + and - clamps off the battery. Sure enough, inside the clamps and on the battery posts was a heavy white corrision that blocked the clamps from making a failsafe connection to the battery posts. So I took a wire brush and a battery post cleaner and got the clamps 100% clean and the same for the posts. Don't skimp on the effort here, be 100% clean. Additionally, the + and - clamps should be in a C shape with an opening. My + clamp was a solid circle. That solid circle stops you from being able to fully tighten the clamp to the post. So what I did was take a utility knife to the clamp and cut out about a 1/4" section of it to make it a C shape and not a full circle. Removing this allowed the clamp to fully tighten. When I tightened it up, the clamp nut buried itself into the soft metal of the clamp and I could no longer get a wrench to turn it. Solution - remove the nut, put a heavy duty washer on the bolt and then put the nut back on. Now the nut can be FULLY tightened because the washer prevents it from burrowing into the soft metal of the clamp. Now I was positive about the connection. So now I have clean battery posts, clean battery clamps and absolute tight connection between them. The result - no more problems with the electrical stuff going nutso. It all makes sense if the car sees power, then doesnt see it, then sees partial power, etc, all because of poor connection between the battery and the clamps. Hope this resolves this infamous problem. Give it a try and respond back. I know this doesn't fix every electrical problem I have seen on this forum, but it did resolve the spinning gages and associated infamous problems on my Jeep GC. Reported by garage mechanic "Skip" on 2-1-2010, owner of Jeeps GC's since 1995
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