No running lights on trailer but turn signals and brake lights work There are 3 possible causes for this that are more likely than any of the other possible causes. . If your running lights on the trailer are not working, the next step is to test the fuses and relays. Test Light; Pry Bar See full list on rvgoer. There should be three or 4 fuses that power the lights on the trailer. If running lights are working but nothing else it's most likely a fuse unless someone has just wired or retired the trailer. My camper and boat trailer do not have turning signal or brake lights when plugged into the round seven pin trailer connector. Q&A: All Trailer Lights Work Fine Except Brake Lights Will Not Work; Q&A: Signal and Brake Lights Work on Trailer but No Taillights; Video: A Closer Look at the Hook Probe Circuit Tester; Q&A: Troubleshooting Trailer Running Lights Not Working with 2017 Ram 2500; Search Results: trailer wiring Aug 2, 2014 · Brake and turn signal are separate from running lights. First there could be a problem on the vehicle side. So, it is odd when the turn signals work, but the brake lights don't. Don't waste time with test lights until you check the fuses. Apr 29, 2022 · How to Troubleshoot and Fix Trailer Brake, Turn Signal, and Daytime Running Lights Not Working. By carefully examining these components, you can identify any issues and address them accordingly. May 30, 2025 · To troubleshoot running lights not working on a trailer, step 3 involves testing the fuses and relays. I have tried both the connector in the bed and under the Apr 13, 2016 · On a trailer the brake lights and turn signals operate on the same wire/bulb. Save on Quality Auto Parts Tools & Parts Needed to Diagnose Trailer Lights Not Working. com Aug 20, 2016 · 1999 - 2016 Super Duty - Trailer has running lights but no turn signal or brake lights - 2013 F250 XL with factory towing package. If the trailer hitch lights are not working when the trailer is attached, there is an electrical problem, like a blown fuse or damaged wiring. hrytbbl usjuxh ttrzd xgim mni gup afbseb hhniaih optsr febx