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Hot Wire To 7 Pin Outlet

jspecht

By jspecht
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jspecht Enthusiast

jspecht

Posted
Posted

I also posted something similar in another thread, but I was afraid that no one would see it there. I just bought a 2000 Silverado 1500 and I am planning on pulling my travel trailer. I took my old brake controller from my old vehicle and was expecting the hooking up to my new used truck to be a snap. After looking on line a bit, I found out that I have an electrical box under the dash where, with the proper harness, I can plug in my controller. I have ordered that part and then moved to the outlet to make sure everything was there for my trailer. It only has the 4 wire hookup into the 7 pin outlet. I figured that would be no big deal to find the wires I needed near the rear end and tap into them, but I cannot find a 12 volt hot wire anywhere. I have now guessed, after reading some posts here and elsewhere, that I may have to run that wire myself from the battery. I looked under the hood and into the electrical box and found the red wire, with a round terminal on it, and a blue wire with some sort of plug on it, hanging loose and taped together. From what I have read, I am thinking that the red wire gets hooked up to one of the studs and that goes to my controller, but does that just power the box under the dash that my harness plugs into? Or is the other end hanging somewhere under the dash? I looked, but did not see one. Also, I did not see anywhere to plug the blue wire into, where does that go?

What's the best way to run my hot wire to the back of the truck? Should I try to fish the wire (10 gauge?) through the other bundles, or just strap it to the outside of the bundle that runs to the rear?

I know this is sort of long winded, but I have been messing around with this for a few days, and I have built up a lot of questions. I appreciate your help.

Thanks,

Jim

DofD Senior Enthusiast

DofD

Posted
Posted

Hey there and welcome to GM Trucks! :thumbs:

 

There should be several constant 12v supply wires under the dash. There have been a number of threads talking about installing the controllers in the fullsize an HD forums, so a search of those should turn up some good info for you.

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