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Wiring A Brake Controller

kwasyd

By kwasyd
in Ask A GM Technician

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kwasyd Enthusiast

kwasyd

Posted
Posted

Hello.

I have an 05 Chev DMAX 2500.

I want to hook up my brake controller.

I connected it the exact same way I did in my 01 1500 and it works.. except my sunroof will not close.

I have disconnected until I can get some advise on why it may be different and how the sunroof might interfere.

Thanks

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

Are you using a connector that came with your '05 or are you trying to use the one you had in your '01? They are wired differently.

 

Seen an issue with headlights when the wrong connector was used, though I can't say I ever heard of a sunroof not working.

SierraSmurf Enthusiast

SierraSmurf

Posted
Posted

Yup, the '01 is different. I had to move the red wire on the harness from one corner to another when I hooked up the brake control to my '05. They changed a couple years back. Sorry, but I don't remember right now where it was or where I had to put it. I'll pull it out later and try to give you an idea/ diagram. I'm pretty sure I found the info online though. Have you tried a google search? Don't know what to say about the sunroof....

kwasyd Enthusiast

kwasyd

Posted
  • Author
Posted

Yah, I am using the 05 harness. I let the 01 go with the sale of to 01. So I have the proper GM harness. It looks the same, color wise.. so my assumptions were to connect the same color wires as I did with my 01. Bad assumption obviously.

I did a google search but didn't find much. I will have to spend some time, testing the outputs on the harness and then figure out where they would have to go on the controller. I appreciate the effort and information.

Thanks gents

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

The following information is for the 2003-05 wiring harness.

 

Pin

Wire Color

Circuit Number

Function

 

A

BROWN

2409

Brake controller illumination

 

B

RED

242

Brake controller 12 volt source

 

C

DK BLUE

47

Brake Controller output (Trailer Brakes)

 

D

LT BLUE

1620

Stop Lamps

 

E

--

--

--

 

F

BLACK

1850

Ground

  • 1 month later...
kwasyd Enthusiast

kwasyd

Posted
  • Author
Posted

Hey Guys.

Here is what I discovered..

I looked at the wiring that you provided and some others I found online. They all really said the same thing. I then looked at my wiring and found I had it wired exactly as described.

Here is what I think it was.. as odd as this is. The day I hooked up the controller I had my sunroof open. I connected the harness and headed down the road. Once I got to the campsite I tried to close the roof and wasn't able to. It would go from slid open to slid closed, but not drop close. I guess having it open when connecting confused something. Anyway, this time I connected when the roof was closed and all works fine.

Strange hey!?!?

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