Troubleshooting Power from Connector on Pickup but No Trailer Lights
I have power at the plug on the truck, but no running lights,or tail lights,or turn singals
asked by: Samuel K
Helpful Expert Reply:
If the connector on your pickup shows power for the lights when you test it then the issue should be on your trailer. You can verify this by connecting a different trailer to your pickup or by using a 12V battery to power the individual pins on your connector. Just ground the negative terminal and use a wire from the positive terminal to power the different pins.
The most common issue with trailer lights that aren't working is a bad ground. Since none of your lights are working though I would start off by making sure that your trailer connector is still in good working order. Make sure it doesn't have any debris or corrosion and clean out as necessary. The next step is to trace all of your wiring and look for places where it is pinched or damaged with 16 gauge wire like part # 16-1-1 which is sold by the foot.
Attached is a helpful article on troubleshooting trailer wiring for you to check out.
- Article: Trailer Wiring Diagrams
- Q&A: Recommended Gauge of Wiring for Trailer Lights
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is the Difference Between the Blue Ox Patriot BRK2019 & BRK2022?
- Q&A: Recommended 7-Way Tester that is Compatible w/ Ram Factory Brake Controllers
- Article: Trailer Lighting Requirements
- Article: How to Measure for Trailer Hitch Drop
- Q&A: Troubleshooting A Dead Towed Vehicle Battery While Using The Blue Ox Patriot Braking System
- Q&A: Replacement Brakes on a 3,000 lb. Axle
- Q&A: Correct Replacement Electric Trailer Brakes for a 3,000 Lb Trailer Axle
- Q&A: How to Mount Magnetic Tow Lamps on Fiberglass Hardtop Roof of 2007 Jeep Wrangler
- Article: The Best Towing Mirrors
- Article: How to Measure the Bolt Pattern of a Trailer Wheel
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)