Brake problems on my Aljo

Thanks for the reply. If the controller is not activated the voltage at the magnets should be zero correct? If the controller says 6 volts should all the magnets be getting 6 volts? I did see a replacement break away switch at tractor supply but it has three wires and mine only has 2. you could be on to something. When I checked the wires and magnets I cleaned the brake dust and packed the wheel bearings. Only one trip and there was a lot of new dust.