first off its trailblazer forum so not a dodge for sure..I thought it was in my signature but noAs Al said, it sure as hell helps when we know what vehicle we're talking about,
If you have a 1/2 ton the connector is 2 feet away from the trailer plug, just trace the wires to the 3 way connector.
And btw, you won't get a voltage drop of that amount in a wire, perhaps at the connector on the end of the wire, but not in the wire itself.
Okay ,I know something is funky on the ebrake feed to the trailer Ill look thanksOn my 1997 GMC K1500 Suburban, its between the gas tank and the bumper. Because of corrosion issues and having a small budget I have completely removed these plugs. Instead all my wiring has been soldered and double shrinkwrapped. Good for ever.
On my 1998 GMC C1500 Sierra, it's in the same spot except theres no gas tank in the way to access it. The sierras 7 way plug uses the factory 4 way plug. Hmmm I installed this many years ago when my buddy owned it.... i cant quite remember but I think someone hacked it up and I put it back together, soldered and shrinkwrapped but with a 4way plug instead of the 7way. The 7way plugs into the 4way and the blue and orange wires which are hidden inside the oem wiring loom were soldered and shrink wrapped to the 7way. Well after looking at this just now I wanna take it all apart and simplify things.... even if it isn't broke. Lol.
So depending on what your driving it should be between the bumper and spare tire? Maybe towards the drivers side frame as this is where it runs to the back.
Gotta get down and take a look.
...... it dosent matter if it's a transport truck wires are wires and brake/turn/running lights are all the same.... they all have to function the same and trailer wiring is the same. Hopefully no one has hacked up your wiring because this makes it a bit harder with plug and play parts.
Have you taken a look yet? Take some pics and post them.
Thanks .. I dont have any moisture in the tail lights at all .Sorry, I missed that you had listed the thread under the Trailblazer/Envoy forum.
I had an Envoy a few years ago, so I'm going from memory, but it's not as sharp as it use to be.
One thing I know for sure, the trailer connector on these trucks will get jammed up with mud on the back side of the connector, this mud will cause the pin to short to ground.
Sorry, I don't remember is the rear wiring harness runs under the truck, or through the interior.
I'm going to say the interior, but I'm not sure.
You do have a rear seat (mid-seat on the XL) fuse panel and the rear lights are fused from there. Because of that, I'll lean towards the harness being inside.
And, back to that fuse panel, I think the trailer connector may be separately fused, the trailer signals may have separate fuses.
Have you noticed water getting into your backup lights? They are behind the rear wheels and will fill with water when you driver in a rain storm.
Some clear silicone around the bulk socket opening will cure that problem.