Troubleshooting Malone Microsport Trailer Left Turn Signal and Brake Light Not Working

Question:

My new megasport trailer left break and turn signal lights do not work Is there a replacement for this?

asked by: Emil L

Expert Reply:

If this is a new Malone Microsport trailer # MPG460G, it would lead me to believe that there's an issue with the wiring that can be simply fixed instead of completely replacing it. I would start by cleaning the vehicle wiring harness of any dirt and debris, and then testing the 4 way trailer plug on your 2012 Jeep Patriot. You'll need a circuit tester like the # PTW2993 and you'll want to engage the left turn signal on the vehicle. You'll then test the pin on the wiring harness that corresponds with the yellow wire. If you're getting power on this circuit then the issue is on the trailer. However, if there is no power on that pin with the turn signal engaged, then the issue is going to be on the vehicle.

If the issue is on the trailer, you'll want to start by making sure that the ground wire is firmly connected to the frame of the trailer. You'll also want to inspect the yellow wire on the trailer's harness and trace it back looking for any damage or potential loose connections. It's possible that during assembly the wire that goes to the left turn signal and brake light got pinched and has been damaged. This can be replaced with 14 gauge wiring and some heat shrink butt connectors like the # DW05744-5.

If you can check those things and let me know what you find, I can continue to troubleshoot this until we get it figured out.

expert reply by: Erik B