Agility Trailer Brake Controller Only Works with Manual Override and Not Brake Pedal

Updated 07/18/2014 | Published 07/16/2014

Question:

used last year , worked fine, getting ready all 4 wheels are jacked up ,hooked up with truck brake does not work by pressing the brake paddle , works by hand emergency.

asked by: Shaawn

Expert Reply:

When a brake controller works with the manual override but not the brake pedal that is an indication of a problem on the red wire. The red wire is the input wire that tells the controller you are stepping on the brake pedal.

Check the red wire connection to the vehicle and fix as needed. It is also possible that the CHMSL or stop light fuse has blown. Use the vehicle owners manual to find the fuse locations.

It is also possible that the controller has been bumped out of its recommended operation range/angle. Check the installation instructions I have linked to see the range the controller can be mounted. Also make sure it is not tilted or turned to one side.

And it is also possible that the power setting has been accidentally turned down too low. But that is an easy fix. Just turn it back up!

expert reply by: Michael H