What is the Function of the Light Blue Wire on a 2006 Chevy 3500 7-Way Trailer Connector
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.
Products Referenced in This Question
Product Page this Question was Asked From
Pollak Replacement 7-Pole, RV-Style Trailer Connector Socket - Vehicle End
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 7 Round - Blade
- Pollak
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Q&A: Extra Blue Wire Near 7-Way Trailer Connector on 2003 Chevy Silverado 2500 HD
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class V Commercial Duty - 2-1/2"
- Shop: Trailer Hitch
- Q&A: What is the Factory Wiring Harness Color Code for a 2007 Chevy Silverado
- Q&A: Replacing a 7-way Trailer Connector on a 2006 Chevy Silverado
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Shop: 10 Gauge Primary Wire - Blue - per Foot
- Q&A: Installing 7-Way Trailer Connector in Bed of 2006 Chevy Silverado 2500
- Shop: Gooseneck Hitch
- Q&A: Wire Color Chart Diagram for Installing Hopkins Multi-Tow 7-Way Blade and 4-Way # HM11141144
- Q&A: Wiring Pattern for a 7-Way RV Trailer Connector on a 2001 Chevrolet Silverado Without Factory Wiring
- Q&A: Where Does a Brake Controller Plug Into on a 2006 Chevy Silverado 1500 with Tow Package
- Video: Trailer Hitch Installation - 2003 Chevrolet Silverado - Curt C15703
- Shop: Trailer Wiring
- Shop: Replacement Dome Assembly for Ventline Ventadome Trailer Roof Vent - White - Wedge Shape - Plastic
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: hitch
- Shop: etrailer Hitch Pin Alignment Collar for Hitch Accessories - 2" Hitches
- Video: Choosing the Right Trailer Wiring
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Search Results: trailer hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Search Results: gooseneck hitch
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Brake Controller
- Video: Choosing the Right Brake Controller
- Article: My Trailer Hitch Doesn't Fit
- Shop: Suspension Enhancement
on Trailer Wiring
