To test the trailer service brakes, you should:

Question

To test the trailer service brakes, you should first ensure that the braking system has a normal air pressure level, then release the parking brake. You should then move the vehicle forward slowly and apply the brakes with the hand control. If the trailer service brakes are working properly, you will feel the brakes activate.

Accepted Answer

Move the vehicle forward slowly and apply the brakes with the hand control.

Answer

Move the vehicle forward slowly and apply the brakes with the brake pedal.

Answer

Reverse the vehicle slowly and apply the brakes with the hand control.

Answer

Reverse the vehicle slowly and apply the brakes with the brake pedal.