| Re: [GMCnet] Electrical Short found but it wasn't easy [message #315041] |
Thu, 23 March 2017 11:35  |
THOMAS R WHITTON
Messages: 47
Registered: September 2016
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I'm re-posting this because for some reason it didn't appear after I first tried to post it a few days ago.
Please thank Yahoo if you see question marks in strange places...
A sincere thanks for everyone's suggestions in helping to resolve this problem.
I finally found the short in the right tail light, brake and emergency flashers. Call me "Speedy." It only took a few hours most days for over two weeks to trace the short without success. In the end, it turned out to be caused by a hidden crushed wire running between the body and frame. It was a bad wiring job done by a local RV store soon after I bought the GMC in 2001. Their work was both expensive and bad. Anyway, I learned a long time ago not to use them but, unfortunately, their bad work has lived on. The crushed wire ran between a 10-wire connector in the generator compartment to the trailer connection under the coach. The good news is I learned how to trace shorts but I'm not going to come out of retirement and go into Electrical Short Tracing. I took umpteen resistant readings from front to back and bought a cable tracer from Harbor Freight. I also put together a light to plug into the fuse socket that lit when a short was present and did not lite when there was no short in the circuit. These tools helped determine that the short was somewhere between the 10-point connector in the left rear and the right tail light. Getting to the approximate vicinity was essential. Checking wires and connections in the rear, I finally found the short by pulling wires. I pulled fairly hard on one of the green wires. It broke where it was hidden between the frame and the body. The insulation was gone, the copper wires were crushed. It was obviously shorting against the frame. Case closed.
My project for the next couple of days will be redoing all the wiring the local RV store installed. You live and learn.
Thanks again for everyone's help.
All the best,Tom Whitton26 foot updated GMCPaducah, KY
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