We had the problem on an '04 Grand. I have 2 friends with the problem on JKUs. The dealer told us to replace the wiring harness. Not just to the door but the entire wiring harness at over $1K. plus install. We sold/traded our Grand in. My friends did the wiring harness which solved their problem.
And yes before selling ours we did all the above trying to solve the problem in our driveway.
My Uncles first Jeep was a Government Issued Jeep in 1944.
Back when ALL Jeeps were Government Issued.
Thanks for the response. I was hoping someone may be able to give me the exact wire that was causing the problem and I could just splice a new one in. I may be stuck replacing the entire harness. I'm tempted to try a junk yard first. Thanks again.
I had a similar problem that was caused by a broken wire in the harness. I can't tell you which wire it might be but if you pull the rubber "conduit" (between the door and body) back you'll probably find one or more broken wires. Sometimes you have to look close because the loose end of the wire will be stuck in the conduit. Can easily be spliced back together. I recommend checking the harnesses in the other doors and I think it works as a system and broken / flaky wires there will cause intermittent problems. Hope this helps!
Tom, thank you for the response as well. I checked extensively for a broken wire at the door frame, but I was mainly looking for a wire that was still barely attached by the sheath. I will take a closer look and see if it's broken completely and now hidden in the door. It's worth a shot. Take care, Brian.