Color codes for trailer wiring ?

Gary Steeves

Well-known member
I am installing new brake controller and need to know what the wiring color code is on the 2005 Chev 2500HD. I have the factory "pigtail" under the dash which is now plugged into a Prodigy. The new controller simply has 4 wires which I need to splice into and need to know which color wire is the trailer brakes, stop lights, etc....

Any help appreciated !
 

katkens

Founding Illinios Chapter Leader-retired
Red---12Volt
Lite blue---Stoplight
Black ---Ground
Dark blue---trailer brakes
 

Gary Steeves

Well-known member
Thanks for the replys. The link you gave me, Chopper Bill is a great source.

I talked to Chevrolet and the colors are:
Red -Battery feed
White -Ground
Dark blue -Trailer brake
Light blue -Brake lamp

They also informed me, the color codes are on page 4-96 of my 2005 owners manual (I sure couldn't find it - but old age is setting in) .....and now we know the rest of the story !!

(JULY 24,2007 EDIT) - I installed new controller today and my wiring colors were:
Red-brake light, white-ground, dark blue-trailer brake, black-battery feed. I did not have a light blue.
 
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