The colors are listed to make troubleshooting a lot easier. Until you get used to the color-coded system. If you are not an electrician, a 7-pin wire connector can be a bit intimidating. Tightening the bulbs or cleaning the sockets will be your solution to those issues. Also, check for loose light bulbs, rusty bulb sockets to make sure those are not causing the fuse to blow. The presence of those elements tells you that there is a problem with the wire and not the fuse. As you trace the wire, look for crimps, cracks, bends, frays, and pinches. The color of this wire is usually brown so you can find it very easily. When you start looking for the short, you have to follow the wire from the connector to the lamps. If you do replace your fuse and it blows right away or very quickly, then you know you have a short somewhere in the system. if there is a short in the system, you will keep blowing fuses.
![7 pin trailer connector 7 pin trailer connector](https://ae01.alicdn.com/kf/HTB1ZhaHkyCYBuNkHFCcq6AHtVXad/13-Pin-Turn-7-Pin-Plug-Socket-Car-Cable-Connector-Waterproof-Trailer-Signal-Light-Car-Towing.jpg)
However, before you start changing fuses, you need to check your wiring first. Sometimes it is under the hood and other times it is near the floor on either the driver’s or passenger’s side of the car or truck. The exact location of your fuse box will be determined by the make, model, and brand of your vehicle. Yes, there is and it is usually located in our fuse box. Is There a Fuse For Trailer Running Lights? Once you find the problem, then you should know exactly what you need to do to fix it. This is a step-by-step process and may take you a little time to find the source of your problem. If there are other problems, then you should get your multi-meter out and start testing for continuity, power, and so on. Then you simply have to connect those wire ends to the right connectors to make sure all your trailer’s electrical devices work properly. In this solution, you would have to cut off the old plug and then expose the wire ends. The permanent solution would be to replace the plug. This doesn't take long and you will easily know when you have succeeded in bending them far enough. The first one would be temporary as all you have to do is bend the connectors back so that they fit tight. You have two options to use when you find yourself in this situation. Once that happens the connection becomes loose and you may get a warning on your brake controller that the trailer is not connected. One of the simplest sources is when the connectors become bent or damaged. This will depend on the type of problem that occurs with the 7-pin connection. How Do You Troubleshoot a 7 Pin Trailer Wiring? Re-tightening the terminals, cleaning them up, or replacing them with a better type of terminal are your solutions here. The crimp-style terminals are known for coming loose or collecting corrosive materials. In any of those cases, replacing the wire or tightening the connection are the best options. Or the wires have come loose, corroded, or frayed at some point. If either are bad, then you will have to re-wire the trailer or the vehicle to get proper function out of the trailer lights. Or the bulbs may have burned out, due to many reasons, and they or the fuses simply need to be replaced.Īnother source could rest with either the tow vehicle’s wiring or the trailer’s wiring. The fuses may have blown and have cut off the power supply. Then you should check the fuses and the light bulbs in each of the trailer lights. You have to make sure this wire is connected to an unpainted surface and there is no dirt in the way. One would be that the ground wire is not connected properly or there is some rust and corrosion that has marred the connection.
![7 pin trailer connector 7 pin trailer connector](https://www.linko-connector.com/photo/pl20755599-7_pin_ip66_outdoor_waterproof_power_cable_connectors_500v_12a_for_electric_trailer.jpg)
There is a myriad of sources for this situation. What Would Cause Trailer Lights Not To Work? There is no easy solution to this situation. Or, you may have to replace one or both of the connectors to get all the functions, including the running lights, to work properly. The key to fixing this problem is to test each terminal and then match it up to the function it really operates. This statement is supported by the fact that the middle connection is often labeled as an AUX circuit when in reality, it is not a ground terminal but operates the back up lights. Then when that happens you have to go on a search to find out how the 7-pin wires connect up and to which device they operate. Figuring out what is wrong can be a bit confusing as sometimes the colors do not provide the power to the stated electrical device. This may not be the only source for your problem. This needs you to clean up the connectors and get rid of the corrosion, or you may have to cut and replace wires. One of the causes of this problem would be that either the brass connectors or the wiring have corroded in some way.