Troubleshooting Trailer Brake Function and Grease Seal Failure

Updated 10/30/2018 | Published 10/29/2018

Products Featured in This Question

etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K

(3368)

$152.75

Dielectric Grease for Electrical Connectors, 2 oz.

(1511)

$9.94

etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K

(3368)

$190.74

Hook Probe Circuit Tester

(72)

$13.47

Question:

Trailer was just purchased and when checking brake condition found out the wheel where full of grease because of over greasing. Replaced all four brakes on trailer but only get a small amount of braking when tested. Checked voltage at brakes, ranges from 2 to 12 volts depending on actuator setting. Brakes were adjusted per your directions. Not sure what to do next.

asked by: Bob M

Expert Reply:

Since your brakes have been adjusted properly, that definitely rules out one issue. The overgreasing of the hubs and failing grease seal wouldn't have any impact on the braking unless somehow the grease got inside the drum, but you still want to get a proper replacement seal. If grease did get into the brake assembly, then the brake shoes are ruined and you absolutely need to replace the shoes at minimum. Because we don't know the extent, I recommend replacing the complete assembly with # AKEBRK-35-SA for 10 inch assemblies or # AKEBRK-7-SA for 12 inch assemblies.

It sounds like the voltage is in the right neighborhood depending on how you are testing. I recommend using an incandescent circuit tester like # PTW2993 while using the manual override on your brake controller to confirm a consistent power as well as increasing in voltage. You can also test with direct battery power which would eliminate all ground problems to ensure your brake magnets are functioning properly.

One more thing I recommend is cleaning your trailer connections on your vehicle and trailer. Using a little sand paper to clean the pins will help the connection and some dielectric grease # 11755 will further assist in keeping moisture and debris out for a solid connection that won't corrode.

I've attached a couple of articles to assist with troubleshooting further if needed.