Trailer brakes work in reverse by activating an electric brake controller mounted inside the tow vehicle.

This brake controller sends a signal to the trailer’s brakes, which then activate and apply pressure to the brake shoes and drums.

This pressure allows the trailer brakes to slow or stop the trailer when it is in reverse.

This is a safety feature to ensure that the trailer brakes are automatically applied when reversing the tow vehicle and towing the trailer.

Electric trailer brakes are directional. The brakes are designed to activate when the trailer is going in one direction and to release when the trailer is going in the other direction.

Why do your trailer brakes lock up when backing up?
Trailer brakes can lock up when backing up for a few reasons. One common cause is incorrect or misadjusted brakes.

If the brakes are too tight, they can lock up when backing up. Additionally, if the brakes are worn out or need servicing, they can also lock up.

Finally, wheel bearings can be another cause of trailer brakes locking up when backing up.

If the wheel bearings are worn out, they can cause the brakes to lock up when backing up.

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