Is the trailer hitch wiring what I think it is?
If this is correct (and as the Norwegian diagram seems to indicate) there is probably another module that is the actual trailer lights interface that converts LIN bus trailer light signals to switched voltages for the trailer lights.
How can I troubleshoot a wiring problem on my trailer?
Perhaps the most helpful thing you can do to start troubleshooting is to determine whether the problem is on the tow vehicle or on the trailer. When you use your trailer to test, you have no way to know for certain whether the problem stems from an issue with the wiring harness because the trailer’s wiring system is still part of the equation.
When to troubleshoot a tow vehicle wiring problem?
A lighting problem can originate at any point along the wiring on either the tow vehicle or the trailer, so it is important to determine not only what is causing the problem, but where it is located. The question the troubleshooter will find themselves asking is “There are so many things to check. Where do I start?”
What causes a harness to be overloaded on a trailer?
Harness has been overloaded due to excessive draw from lights or a short in the trailer wiring. Using one turn signal engages the turn signals on both sides of the trailer.
Why does my trailer hitch not fit my car?
The mounting brackets are made from a mild steel that allows the hitch to flex with the vehicle after installation. The Problem: Your Trailer Hitch Doesn’t Fit Because of their size and shape, sometimes trailer hitches get flexed during shipping or transport.
Perhaps the most helpful thing you can do to start troubleshooting is to determine whether the problem is on the tow vehicle or on the trailer. When you use your trailer to test, you have no way to know for certain whether the problem stems from an issue with the wiring harness because the trailer’s wiring system is still part of the equation.
A lighting problem can originate at any point along the wiring on either the tow vehicle or the trailer, so it is important to determine not only what is causing the problem, but where it is located. The question the troubleshooter will find themselves asking is “There are so many things to check. Where do I start?”
How to troubleshoot a light problem on a truck?
Step one for troubleshooting is to check the ground wire connection at the truck’s wiring harness and at the trailer’s plug. Make sure both of these connections are secure and made to a clean bare metal surface. If that does not correct the problem then you will troubleshoot further.