Question about GMC C3500
Posted by Anonymous on
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Posted on Jan 02, 2017
I'd get a 12vdc test light if you don't have one already & start from plug, and keep probing back from there. It may be as simple as a bad connection under truck where joined into harness.
Posted on Nov 29, 2008
Is this a 4 way or 6 way connection system? If your truck is wrong, then all factory equipped trailer package harnesses would be wrong, tell your trailer guy...I don't think so.
Is this the first trailer you have hauled?
Let me know, and we will go from there.
Posted on Mar 10, 2009
Check the plug at the back of the truck for corrosion. The brown wire entering the truck plug should be the the running lights, if no juice at truck plug in, you need to trace it back to the source looking for broken, pinched, wires, or poor connections.
Posted on Apr 16, 2009
SOURCE: 2005 silverado trailer wiring
You may want to get a ground loop isolator or even cheaper. Go to radio shack and buy two 1amp diodes and put them on each turn signal wire. This will eliminate the problem. The diode will be black with a gray line. the line will go towards the trailer on each wire. this should take care of the problem.
Posted on May 08, 2009
I have seen once before that the fuse box was bad on a 2003 Dodge 3500. I had power in and nothing out. We had to replace the box. Not cheap! Hope it is simple like a loose connection though. I think I had to pull the inner fender on the drivers side to access the bottom of the fuse box. Pain in the ****, but...
Posted on Oct 01, 2009
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