Troubleshooting Trailer Wiring for Ford 150 4x4
Question:
truck had all lights working, hooked it up to camper and lights on camper worked until I turned on the headlights then the camper lights went out. I was testing the truck wires in the back when everything stopped working. Red fuse in the is not blown I tested it.
asked by: Susan P
Expert Reply:
First thing to do is use a circuit tester like # PTW2993 to check each pin function on your trailer connector at your rear bumper. I've attached an article to assist with function locations. It sounds like your system was overloaded and shut down. The change in draw with the headlights on is significant enough that a bad ground on your trailer or truck could cause the camper lights to go out.
If when you tested the system shut down, then you want to not only check the red fuse as you stated, but grab your owners manual and check every fuse and relay in your system that has towing associated. If the fuses are good and you still have no power to any of the functions, replace the relay. If you still don't have power you will need to trace your wires using the circuit tester to probe every few feet to find the short. Check the hot side of the fuse location to make sure power is even getting there.
Once you've replaced all fuses and relays and checked the system wiring all the way back, let me know and we can continue to troubleshoot. Depending on the model year, you may need to use a different connector for proper function. I've attached an article to help as well.
Products Referenced in This Question
Product Page this Question was Asked From
Ford Replacement OEM Tow Package Wiring Harness, 7-Way
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is the Difference Between 7-Way RV and Utility Trailer Connectors
- Q&A: Recommended RV Exterior Ladder for 22 Ft Thor Four Winds RV
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: Will the Draw-Tite Trailer Hitch Fit a 2022 Volvo XC90 Recharge
- Q&A: Installation of Hitch on Fifth Wheel Trailer
- Q&A: Replacement Parts for Fan-Tastic Vent 8000 Series
- Q&A: How Much Upward Bend Should Trailer Axle Have
- Article: How to Charge a Trailer Battery While Driving: 3 Common Problems (And How to Fix Them)
- Article: Best Vehicles to Flat Tow Behind an RV
- Article: Trailer Wiring Diagrams
- Article: How to Choose the Right Trailer Hitch Class
- Article: Brake Controller Installation on a Full-Size Ford Truck or SUV