Below is the generic schematic of how the wiring goes. It is possible that one of the bulbs on your trailer burned out.
4 Pole Trailer Wiring Diagram H1 Wiring Diagram
Troubleshooting 4 pin trailer wiring. Buy a 4 pin wiring kit with wires at least twenty feet in length so its long enough for your trailer. Installing your 4 pin trailer wiring system is easy if you follow the correct procedure. Above we have describes the main types of trailer wiring diagrams. Connecting the wrong color wires will result in mismatched taillight functions and confusion on the road. Our guidelines will help you narrow down and repair the most common causes of issues during 4 and 5 way wiring installations. If it is not no amount of wiring will get the lights to work.
Have a helper stand back to see if the running lights stoplights and blinkers are working properly. The most common wire thickness for a trailer is 16 gauge but i bought thicker wiring for added durability. Troubleshooting trailer lights strategy. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector. It can be frustrating when your wiring isnt working especially when you are not sure where to begin troubleshooting. Use the outlined testing methods to determine whether the issue is on the trailer or the vehicle side so you can more easily pinpoint trouble areas.
Note that this type of 4 pin connector is less common that 4 pin flat connector. 4 pin trailer wiring diagram. This type of connector is normally found on utvs atvs and trailers that do not have their own braking system. Depending on the size of your trailer and the number of lights you might want to check on the internet for the recommended gauge for your specific trailer. Trailer electrical connectors come in a variety of shapes and sizes. Make sure that all cables are electrically conductive.
Check your vehicles plug configuration. Use this 4 pin trailer wiring diagram to properly wire your 4 wire trailer plug. We offer innovative trailer brake controllers custom vehicle trailer wiring taillight converters electrical components and much more. The best way to solve your trailer lights wiring issue is to eliminate possible problems one by one until you have pinpointed the root cause of the malfunction. Select your vehicle to find a custom wiring solution. If all the lights appear dim or you have no lights at all check the trailer light harness at the tow vehicle.
Hook up your trailer and connect the trailer light harness. The first thing you need to do is make sure that your connector works properly. One way to check for faulty wires is to use a circuit tester. Two types of a trailer wiring tester. Curt towing electrical products are built for easy installation and long lasting dependability. By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights.
So check the lights. Following the standard method for wiring a trailer connector is vital to the safety of your vehicle while towing.
Gallery of Troubleshooting 4 Pin Trailer Wiring
