Troubleshooting Brake Lights Not Working on Tow Vehicle
Updated 06/19/2018 | Published 06/16/2018 >
Question:
Hi Guys, Im trying to get my brake lights working. I checked the tie in at the truck tail lights and found the blue squeeze on connectors. I put new inline connectors in. I also found a crack in I the insulation on the plug wires and changed them out to a new plug. but I still cant get my brake lights to work. I get running lights and left and right turn signals but now brake light. I did plug in a tester and tun/lights work what am I missing? any thoughts would be helpful. Thanks,
asked by: Bob
Expert Reply:
Sounds like you have a blown third brake light fuse on your tow vehicle if you can get all of the other functions to work but not the brake lights. Check out the fuse box of the vehicle and replace that fuse and you should see the lights work like they should.
Product Page this Question was Asked From
Featured Help Information
Miscellaneous Media
Continue Researching
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Article: Trailer Wiring Diagrams
- Q&A: How to Test Brake Controller without Trailer Connected
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Recommended Warm White 4-1/4" Diameter Puck Light
- Q&A: Trailers Right Tail Light Stays on Even While Unplugged
- Article: Brake Controller Installation: Starting from Scratch
- Q&A: Troubleshooting Right Side Trailer Lights Not Working, Left Side Working Correctly
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Can I Use a 4 Way Vehicle Connector with 7 Way Adapter and the Curt Echo Brake Controller?
- Q&A: Suspension Enhancement Recommendation for 2003 Toyota Tundra with B and W Turnoverball
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Article: Trailer Lights Not Working After Winter? Test Truck or Trailer


