Solution for Brake Output Circuit on Truck that is Shorting Out Somewhere on Vehicle
Question:
The brake controller I have is working, I used a ground, 12volt sorce, and ran hooked the blue brake wire up to the trailer and it applies the trailer brakes. When I use a 12volt sorce to the blue wire in the cab it does not apply the trailer brakes. The voltage in the cab starts at 12.12volt and is down to 10.88 to 11.44volt at the rear. Is the blue wire that runs from the cab to the rear plug in, shorting to ground or do I have a ground issue some where.
asked by: Chuck
Helpful Expert Reply:
It does sound like there is a short somewhere on the brake output circuit of your vehicle. You have two options. You can try and track down the short which is going to be a headache most likely. Or you can run a separate wire from the brake controller to the 7-way so that you can bypass all of that.
If it were me I would check out the connector on your Avalanche looking for any corrosion and fixing/cleaning as necessary and if that does not fix the problem I would run a length of 10 gauge wire like our part # 10-1-1 (sold by the foot) from the controller to the 7-way.
Products Referenced in This Question
Product Page this Question was Asked From
7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- 4 Flat
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Article: How to Choose the Right Trailer Hitch Class
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: My Trailer Hitch Doesn't Fit
- Article: Brake Controller Installation: Starting from Scratch
- Article: How to Measure for Trailer Hitch Drop
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Availability Of Hub/Drum Kit With Brakes And Hardware Similar To Part BPH1206EPR
- Q&A: Availability of Trailer Hitch and Wiring for 2020 Ford Transit T350 With Extended High Roof
- Q&A: Parts Needed To Add a Tow Package To a 2024 GMC Canyon
- Q&A: How Does the Hopkins 7-Way part # HM40975 Wire to a Vehicle
- Q&A: Does Trailer Hitch For 2023 Chevy Colorado Have a Hidden Crosstube