Is there a relay for trailer lights?
Is there a relay for trailer lights?
Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed.
What should I do if my trailer lights are not working?
Open them up and make sure there is no white or green corrosion causing an issue inside the connectors. If so clean them out or replace the connectors with new ones. If the problem is not found in the connectors, you will need to follow the trailer wiring and check all of the grounds for all of the lights and the trailer connector.
What are the running lights on a trailer?
The next thing is to make sure the wires on the trailer plug is wired properly to the trailer. If you have a 4-Way connector on the trailer the white wire is for ground, the green wire for right turn and brake, yellow wire for left turn and brake, and the brown wire is for running lights. I am including a link to a FAQ page on trailer wiring.
What to do if your F-150 has no stoplight?
If there is no voltage at the terminals, you know the problem is with the truck. If it’s a trailer problem, (as already suggested) check the ground on the trailer. If it’s a problem with the truck, (even though you said the fuse was good) replace the fuse.
Why are there no brake lights on my F-150?
If you have voltage on the terminals for the turn signals/brake lights there, you know the problem is in the wiring for the trailer. If there is no voltage at the terminals, you know the problem is with the truck.
Why are my trailer lights not working properly?
If there is no power on any of the pins for this test then there is likely a blown or missing tow package, stop light, or CHMSL fuse on the vehicle. If there is power then the issue is on the trailer. A bad ground can cause this problem.
The next thing is to make sure the wires on the trailer plug is wired properly to the trailer. If you have a 4-Way connector on the trailer the white wire is for ground, the green wire for right turn and brake, yellow wire for left turn and brake, and the brown wire is for running lights. I am including a link to a FAQ page on trailer wiring.
If there is no voltage at the terminals, you know the problem is with the truck. If it’s a trailer problem, (as already suggested) check the ground on the trailer. If it’s a problem with the truck, (even though you said the fuse was good) replace the fuse.
If you have voltage on the terminals for the turn signals/brake lights there, you know the problem is in the wiring for the trailer. If there is no voltage at the terminals, you know the problem is with the truck.
