Troubleshooting Blown Fuses When Trailer Wiring is Connected
Question:
I was working fine for three four months bur now every-time y do plug in the trailer my fuse get burn some time work fine if it work fine and them I make a turn and the fuse goes out the original light bulbs are incandescent but I did add leds but it was working fine since the beginning .
asked by: Jaime
Expert Reply:
Blown fuses from trailer wiring are due to either a short somewhere on the trailer wiring circuit or that the trailer is drawing too much amperage for the circuit. Since you said you installed LEDs it would seem unlikely that it's drawing too much.
Make sure that the trailer side connector are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.
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: Troubleshooting No Running Lights on Trailer but Turn Signals and Brake Lights Work
- Q&A: Trailer Lights Left Side Turn Signal and Brake Lights Not Working
- Q&A: Recommended Flat Towing Parts for a 2024 GMC Canyon Denali
- 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