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GM Trucks - power to the trailer connector

Tow vehicles - discuss, debate, and assistance.

GM Trucks - power to the trailer connector

Unread postby pwall on Tue May 18, 2010 11:38 pm

For whatever reason, GM decided that it would be a great idea to NOT connect the brake controller and power-feed wires to the 7pin harness connector.
I purchased my truck second-hand (allbeit with onnly 9000kms on the odemeter :) ), and it has the integrated brake controller. The wire was connected.
Never thought to check the power to the harness...dumb me. It wasn't connected!
Ok, I say to myself....Pat, you're stupid. Go to the dealership and get the connect nut to put on the wire. Dealership didn't have it in stock, and they wanted $10.....$10 for a small 6mm nut! He gives me a regular nut to use as I'm heading out camping this weekend.
go to put it on tonight, and it's an SAE nut, not a metric nut! argh....ended up going to Home Depot and spending 18cents on a 6mm nut.
At least at the end of the evening, I now have power to the 7-pin harness.

Ok GM....did saving the extra 18cents mean that much to you ? Uh?

Ok, thanks for listening, I fell better now. :)
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Re: GM Trucks - power to the trailer connector

Unread postby Little Kopit on Wed May 19, 2010 6:17 am

pwall wrote:Ok, thanks for listening, I fell better now. :)


Sorry, Pat, glad you got the job done.


Glad you feel better, but what did you fall on? :P

Have a good weekend.

8-)
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Re: GM Trucks - power to the trailer connector

Unread postby bert64 on Wed May 19, 2010 6:45 am

Funny that is was not hooked up, my buddy has a 2010 Ford F150 with a factory trailer tow package with brake controler. He picked up a power jack for his trailer last week and called me over because he couldn't get it working. Turns out that his 7 pin was not hooked up like your. Yet my Dodge without a trailer tow pack is hooked up and working fully. :shock:
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Re: GM Trucks - power to the trailer connector

Unread postby pwall on Wed May 19, 2010 9:11 am

Don't know if it's some sort of stupid liability clause.....doesn't make sense for the manufacturer not to connect the wires.
Mind you, I'm sure many would get the dealership to do this, thus making money of us.
See...there I go again, rant rant rant. ;)
I only realized this while working on a project, which I'll share those details next week when I have pictures.

And yes, I feel better....... :D
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Re: GM Trucks - power to the trailer connector

Unread postby Zinger on Wed May 19, 2010 6:59 pm

where is this wirk Ill check mine what pin is the one to check?
Have a good one
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Re: GM Trucks - power to the trailer connector

Unread postby pwall on Wed May 19, 2010 11:38 pm

Here is a picture (taken from a prodigy brake controller how-to guide written by someone else).
Stud #1 is 12+ for charging your trailer battery(ies). The wire is taped to the harness just under the brake fluid container.
Stud #2 is for the trailer brakes. This wire is taped up between the fuse panel and the fender.
Will also need two fuses, 30amp for the trailer brakes, and 40amp for the power feed. I forget which slot numbers they are, but it's in the 60 range (it's listed on the fuse index chart on the cover).
Hope this helps.
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Re: GM Trucks - power to the trailer connector

Unread postby Ontariofarmer on Thu May 20, 2010 7:27 am

Hope you have a GREAT weekend Pat......... now that you got that out of your system :)
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Re: GM Trucks - power to the trailer connector

Unread postby 86bigred on Wed Jan 26, 2011 10:48 pm

don't forget that gm also buried the wires for the brake control and power wire in side the plastic wire cover leading to that fuse block.what was gm thinking? ha ha ha
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