Perform the test with the aid of a circuit tester. Proceed with investigating the vehicle side trailer connector, provided that the source of the problem is not a bad relay or fuse. Whatever may have happened, the affected parts would have to be swapped out. Blown fuses will disrupt the power supply. The bulbs and/or fuses may have stopped working as a result of burnout that could have been caused by various reasons. You can move on to checking the bulbs and fuses in all the trailer lights once you are through with the above checks. They can be the cause of your trailer running lights are not working! Inspect them and make the necessary replacements. Wait, what fuse controls trailer running lights? Look for where the relays/fuses linked to the tow package wiring locates with the aid of the vehicle’s manual. A vehicle tow package fuse could be the culprit. Swap out the affected components if you notice something wrong. Blown Tow Package Fuse/RelayĮxamine the relays/fuses for any fault or damage. Run jumper wires to the main trailer connector ground directly from the light grounds to resolve the above issues A faulty connection on the ground wire may cause the running lights stop working. An obstruction between the metal trailer frame and a light ground Solution:.You should also examine the wire to ensure that it isn’t connected to a surface that is painted.
It could be a case of corrosion, accumulated dirt, or rust. The ground wire may have a faulty connection that needs rectifying. 6 Some Final Thoughts for Trailer Running Lights Not Working Ground Wire Not Connected Properly.5.3 What Color Wire Is The Running Lights on a Trailer?.5.2 Where Are The Fuses for Trailer Lights?.5.1 Do Trailer Running Lights Have a Fuse?.5 Trailer Running Lights Not Working – FAQS.
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