Running and Tail Lights Not Working on a Trailer
Question:
Your advice is GREAT! I have a 97 F250 HD gas model with 7 blade wiring harness [factory?] I have everything on my trailer working except marker and running/tail lights which are essential for night driving. Any possible solutions / shortcuts / patchwork. Ford says look in the control box under the hood / everything appears O.K.....HELP!
asked by: Robert
Expert Reply:
The first thing that I would do is use a circuit tester and determine if you are getting power through the connector (with the lights turned on.) If you are getting power there, just trace the wire back to the trailer, looking for broken, frayed, or pinched wires. If you have no power at the connector with the lights on, I would double check that under hood fuse box. Check with your owner manual to see which fuse relates to that circuit.
Product Page this Question was Asked From
Continue Researching
- Article: Trailer Wiring Diagrams
- Q&A: All Parts Needed to Flat Tow 2014 Chevy Silverado 1500 Behind Motorhome
- 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: Testing Trailer Brake Magnets for Proper Function
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: Troubleshooting Brake Controller Installations
- Q&A: How to Make an Adapter to Go from Semi Truck 7-Way Round to RV Style 7-Way Blade on Trailer
- 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: Troubleshooting 7-Way Installation that Has No Right Turn or Stop Lights on Trailer