Are trailer lights always on?
Its not the delay in the truck lights after you turn off. The trailer lights will stay on for a LONG time if not disconnected. I suspect your problem is caused by a damaged or corroded trailer connector. Take a look at your trailer connectors, both the socket on your truck as well as the plug on the trailer.
Why does my trailer light keep going out?
A poor ground often becomes the culprit when only some lighting functions are working and when lights go out when you push the brake pedal. This means that using several functions at the same time creates the load that a weak ground can’t handle.
Why are the lights on my tow truck not working?
Trailer light problems can be traced to any point in either the tow vehicle’s electrical system or trailer wiring, so visual inspection and testing are the first things to do. Because the most common reason for trailer lights not working properly is a bad or missing ground, check the trailer’s and truck’s ground connection first.
Why do the turn signals quit working when the lights are on?
The reason the turn signals quit working when the lights are on, is that a 12-volt signal is now being sent down the opposite wire, which was acting as a ground before. Once the lights are turned off, everything will work fine again.
What to do if your trailer light breaks?
Use the circuit tester to see if current is going to the light fixture itself. Begin with checking the harness that goes into the fixture in question and move all the way back to the tow vehicle to find the point where the circuit breaks. You may need to clean the brass terminals using steel wool or wire brush to restore a good connection.
What should I do if my trailer lights are not working?
Usually the best way to troubleshoot your wiring issue is to disconnect the trailer from the truck’s 4-pole and test each one individually. However, based on your description of the problem – all trailer lights working until you turn on the vehicle headlights – there is one most-likely cause that should be easy to correct.
Trailer light problems can be traced to any point in either the tow vehicle’s electrical system or trailer wiring, so visual inspection and testing are the first things to do. Because the most common reason for trailer lights not working properly is a bad or missing ground, check the trailer’s and truck’s ground connection first.
Why do trailer lights flicker on and off?
If the trailer lights flicker on and off, there is a good chance the trailer is grounding by way of the hitch instead of through the trailer’s wiring connector. Check to see if the vehicle ground wire is stacked with additional wires on a screw. If so, consider moving it to a screw of its own or at least move it to the stack bottom.
The reason the turn signals quit working when the lights are on, is that a 12-volt signal is now being sent down the opposite wire, which was acting as a ground before. Once the lights are turned off, everything will work fine again.