What is the Function of the Light Blue Wire on a 2006 Chevy 3500 7-Way Trailer Connector
Updated 04/24/2015 | Published 04/23/2015
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Question:
i have on 06 chevy 3500 with tow package what is the light blue wire thats capped off in the harness for the 7 pin trailer plug
asked by: Austin
Expert Reply:
Usually, a blue wire is for electric brake output from a brake controller to the trailer brakes. But you can't always go by wire color. The best way to determine the function of any wire is to use a circuit tester such as # PTW2993 to test wire functions.
If that wire is for a brake controller though you would need a brake controller to send back power to test it. Otherwise, you would not be getting any signal on the circuit tester.
You could also open up the back of the 7-Way and see which location is missing a wire. The location that is missing the wire should have some indication of its function. For example, if it was for electric brakes then it would likely read BRK. I have included a picture of a vehicle side 7-Way. Ignore the wire colors and look at the functions and where they are located at the back of the 7-Way.
Product Page this Question was Asked From
Pollak Replacement 7-Pole, RV-Style Trailer Connector Socket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- 7 Blade
- Plug Only
- Pollak
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