make sure you have a good ground wire from the box to the frame, I had the same problem on a '79 Chev truck, 8 bolts holding a metal box to a metal frame and not one was a good ground. :confused:


My GMC has a bad case of ship fitters disease!
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1958 GMC
1956 Chevy 1500 Hydraulic Dump Truck
1952 Chevy 1700 3-Ton Firetruck

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