Troubleshooting New Trailer Brakes That are Locking Up

Published 03/16/2018

Question:

I have a 6x12 cargo trailer with dual 3500 axles with elec brakes on both.the driver side front left wheel locks up and slides.we have adjusted all 4 wheels to about the same drag. But even when ur trying to adjust the brake controller so I can get it to a position that they will start to work then it goes from basically not holding back at all to locking up and dragging that front driver side wheel. It feels like that wheel gets all the power first which makes no sense.any ideas on what to look for or or what to test to figure this promblem out would be greatly appreciated

asked by: Bob P

Helpful Expert Reply:

You might want to start out by checking the wiring for your trailer brakes. There could be a short on that circuit (bad ground or damaged wiring) that is causing things to act weird.

Most likely you have a bad brake magnet. Take a multimeter, like part # PT89ZR, and test your brake magnet that is acting up with a 12V battery. I have attached a link to a helpful article that goes over how to test a brake magnet for you to follow.

If that doesn't fix it let me know and I can help you continue to troubleshoot.

expert reply by: Jon G