What Is Trailer Brake Gain

Trailer gain is the amount of power a brake controller applies to the trailer brakes. It is equal to the maximum amount of stopping force for the trailer. As the vehicle brake pedal is applied, the gain tells the brake controller how much electrical power to apply to the trailer brake electromagnets.

When Should trailer brake controller gain be adjusted?

The gain on your trailer brake controller must be set every time your trailer’s weight changes. The gain is what adjusts the amount of braking force that the electric brakes provide. If not set correctly, it could create a dangerous situation.

Is there a positive and negative on trailer brakes?

Helpful Expert Reply: Trailer brake magnets actually are not polarity sensitive. That means either wire lead can be the positive as long as the other wire is grounded.