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Dave Nova
Dave Nova, ASE Certified Tech
Category: Car
Satisfied Customers: 19450
Experience:  ASE Master Certification. GM World Class Certification
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f150: I have a question about relays for towing wiring

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I have a question about relays for towing wiring
Hello, my name is XXXXX XXXXX I can help you with your wiring question.

What would you like to know about using relays for trailer wiring?

Customer: replied 3 years ago.

Did you get all my details I typed previously?



I am sorry, I received no details. Can you please re-post them?

Customer: replied 3 years ago.



I have a trailer, isolated grounding issue and got blinkers to work independently. However, running lamps will not work for headlights, brakes or hazards. Running lamp wire (brown) does not have voltage or very little. Trailer works perfectly on other vehicles. I am heading to Texas next week and need this to work. I believe it must be a fuse or relay.

The Central Junction Box (fuse panel inside vehicle) contains a fuse and relay for the trailer park lamps. First check fuse F10, then try swapping out the trailer tow parking lamp relay.

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