Electric Brake Installation Standards

phillyg wrote:

laknox wrote:

phillyg wrote:

Braking requires electrical power, and it has to come from somewhere. In my experience, there are only 2 places power can come from. First, and most obvious, is the tow vehicle. Either a bad brake controller or bad wiring, including the plug, is sending random power to the brake circuit. Second, and it's one that many people might not think of right off, is the emergency brake system. If the breakaway switch is shorted, you could be getting power from the coach battery.Lyle

I agree with you Lyle. Since the truck checks out (if I believe Ford), I'll investigate for shorting all the way from the battery terminals. Any opinion on the wiring zip-tied to the spring?

Zip-tied to the =spring= is just weird; never seen that. Course who knows what the guys at the factories do? Axles, yes. If you were having braking =loss=, that's the first place I'd look, for broken or chafed wires, but with uncommanded brakes ON, that's power being shorted right across to the brake wire, IMO. Lots of times wires get chafed where they go =into= the axle tube, which is more normal than an external run.

Lyle