What does a trailer ECU do?
Electronic Control Units (ECU) and Towing Looms Computers monitor and control most of the energy associated with a motor vehicle including the 12v system.
Where is the fuse on a trailer wiring harness?
Yes, trailer wiring harness # 118269 does have a fuse in a black holder just below the large black converter box. If that fuse is fine then use the vehicle owners manual to find any fuses related to tow package wiring on the vehicle to check them.
Why is my trailer wiring harness not working?
If all of the fuses are good and the harness still does not have power at the 4-Way with any of the light functions on then it is likely that the short damaged something inside the converter and it will have to be replaced.
Why is my trailer not getting any power?
If you aren’t getting any power on the wires going into the connector, then the connector itself isn’t the issue. There’s something going on with the factory trailer wiring. Since all the fuses are good there’s likely a short somewhere on the wiring.
Is there a fuse in this unit that may have blown?
Is there a fuse in this unit that may have blown that I can replace? Yes, trailer wiring harness # 118269 does have a fuse in a black holder just below the large black converter box. If that fuse is fine then use the vehicle owners manual to find any fuses related to tow package wiring on the vehicle to check them.
Yes, trailer wiring harness # 118269 does have a fuse in a black holder just below the large black converter box. If that fuse is fine then use the vehicle owners manual to find any fuses related to tow package wiring on the vehicle to check them.
What to do if your tow trailer has no power?
If there is no power at all on the tow package wires and the fuses and relays are all good, you may want to take your truck a local dealer to inspect it. If the wiring on your vehicle is okay, then the issue is on the trailer. The light grounds should also be attached to clean and corrosion free bare metal surfaces.
If all of the fuses are good and the harness still does not have power at the 4-Way with any of the light functions on then it is likely that the short damaged something inside the converter and it will have to be replaced.
Is there a fuse in this unit that may have blown that I can replace? Yes, trailer wiring harness # 118269 does have a fuse in a black holder just below the large black converter box. If that fuse is fine then use the vehicle owners manual to find any fuses related to tow package wiring on the vehicle to check them.