Troubleshooting All Trailer Lights Except the Brake Lights Are Functioning
Question:
Every thing is working except brake lights what is wrong
asked by: Jason L
Expert Reply:
I would start with checking the ground wire, as that's the most common issue when some circuits work and others don't. If the ground connections are all firmly attached to paint and rust free spots on the frame, then I would test the wiring harness on the vehicle to see if you're getting power on the pin for the brown wire. This would let you know whether the issue is on the vehicle or on the trailer. If the issue is on the vehicle you'll want to use a circuit tester to make sure that the wire you've connected to receives power when the brakes in the vehicle are pressed; you'll need a circuit tester like the # PTW2993 to perform this test.
If these basic steps don't get your trailer wiring working, let me know and I can continue to troubleshoot this with you.
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: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- 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