Troubleshooting Trailer Brakes that Lock up When Brakes are Touched
Question:
as soon as i touch brake pedal on truck, trailer brake skid tires on trailer ,but when i go to adjust the brake controller following there steps it tells me no trailer connected i go menu,go to electric brakes, highlight it ,hit ok,go to confirm ,hit ok, then get red screen telling me no trailer connected with the trailer plugged in .
asked by: James B
Expert Reply:
What's happening is that your stoplight circuit is shorting out to your brake output circuit. I bet if you were to put one of the truck's blinkers on the brakes would pulse with the blinker.
I'd also be willing to bet the right blinker is the one that would cause it to pulse as well. Reason I say that is because the brake output circuit and the right turn/stop circuit of the trailer 7-way are right next to each other on the connectors. Check out the diagram I attached for more info.
Check the inside and outside of both the connector on your vehicle and the connector on your trailer. Look for any corrosion or cut/exposed wire and fix as needed.
Product Page this Question was Asked From
Continue Researching
- Article: Trailer Wiring Diagrams
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Brake Controller Installation: Starting from Scratch
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: Testing Trailer Brake Magnets for Proper Function
- Article: Troubleshooting Brake Controller Installations
- Q&A: Will The Curt Dinghy Wire Harness # C96JR Interfere With Activation Of A Blue Ox Patriot
- Q&A: Trailer Lights Left Side Turn Signal and Brake Lights Not Working
- Q&A: Troubleshooting No Running Lights on Trailer but Turn Signals and Brake Lights Work
- Q&A: Troubleshooting Lack of 12V Power at 7-Way Trailer Connector on 2019 Ford F-150
- Q&A: Parts Needed to Flat Tow 2023 Jeep Gladiator
- Q&A: No Splice Tow Bar Lighting Kit Recommendation for 2024 Jeep Wrangler