Troubleshooting Trailer Brakes that Lock Up When Headlights Are On
Question:
When I turn on the head lights the trailer brakes apply - is it the controller or a trailer problem.
asked by: Brian
0
Expert Reply:
You have a short between the running light circuit and the brake output circuit of your trailer wiring. So what you will need to do is go over the wiring behind both connectors (trailer side and vehicle side) looking for any obvious shorts like exposed wire and fix as needed. It's almost always near the connectors but it could also be on the wiring further up from the connectors so you would want to check there as well.
expert reply by:
Jameson C
0
Product Page this Question was Asked From
Tekonsha Prodigy P2 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LED Display
- Up to 360 Degrees
- Tekonsha
more information >
Featured Help Information
Instructions
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Brake Controller Installation: Starting from Scratch
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Article: Trailer Wiring Diagrams
- Article: How to Choose the Right Trailer Hitch Class
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Q&A: Brake Controller Recommendation for a Truck with Air Brakes and a Trailer with Electric Brakes
- Article: Most Popular Wheel Bearings
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: Parts Needed To Install A Brake Controller On A 2023 Freightliner Cascadia
- Q&A: Parts Needed to Install 7-Way/4-Way on 2024 Kia Telluride with LED Taillights
- Q&A: How do I Tell if the Brake Controller is Bad
- Q&A: Lift Kit Options For A 2015 Winnebago Micro Minnie 1706FB
- Q&A: How Is Spring Bar Tension Set Up with Trailer Weight Distribution System