Troubleshooting Brake Controller Install Where Brakes Lock Up Any Time Brake Pedal is Touched


2019 Toyota 4 Runner Hauling a 24 foot Travel Trailer. We went for a test drive and even though all settings were at the there absolute lowest, it was braking at Max with very little Pressure on the pedal, almost locking up.


Expert Reply:

Sounds like you have a short on the trailer wiring between a stop/turn circuit and the brake output circuit which is allowing full 12 volts to apply to the trailer brakes any time the pedal is pressed. Best option is to look for exposed wire on the trailer wiring of both the vehicle and trailer that could be causing the short and fix as needed.

I attached a help article on troubleshooting brake controller installs for you to check out as well.

expert reply by:
Jameson C

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