Troubleshooting Single Brake Assembly of Tandem Axle Trailer not Functioning

Question:

All four wheels have their separate grounds for the electric brakes,

asked by: Brian

Expert Reply:

Since it's an electric setup and only the one brake assembly isn't working my guess is that the ground wire of that brake assembly somehow stopped making contact which is preventing just that assembly from working. Typically the assembly grounds to the trailer frame so you might check the condition of the ground and fix as needed.

I also attached a help article on trailer wiring for you to check out as well.

expert reply by: Jameson C

Brian

1/2/2020

All four wheels have their separate grounds for the electric brakes,

Jameson C.

1/2/2020

If a buddy applies the brakes can you hear all four assemblies humming? Normally they click and then hum when they are activated if they have power and ground like they should. You can also check to make sure the power wire is making it to the assemblies as well. If you can't see anything wiring out of place you'll next want to take the hub off and inspect to see if anything looks broken. If the drum has grease in it that would prevent the brakes from working. This would be caused by a blown grease seal. This typically happens from over filling the hub with grease.