Forum Discussion
Dayle1
Jun 03, 2013Explorer II
The hum is the sound your brake controller makes when it is activating the magnets. Most use pulsed DC voltage to adjust the amount of braking force. The magnets click once when activated by the break-away switch or sometimes 100% power from the controller.
Agree with others, the shoes need time to adjust to the drums.
Agree with others, the shoes need time to adjust to the drums.
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