General Category > R1200 models

ABS not testing, False rear brake signal

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kr4mo:
I'm working on a 2005 R1200GS. The ABS light flashes at 4 hz all the time. The rear brake light is on all the time. The GS911 says the rear brake switch is activated, but the switch is unplugged. The heated grips are also heating up even though the switch is in the off position. Anyone else had any kind of issues like this?

WayneC:
Dont know about the 1200 but BMW reuse the same heated grip 3 pin connector on other items on the 650GS so it would suggest a possible connector swap

kr4mo:
Good point about swapped connectors. I will check that next

kr4mo:
Turns out a new brake switch corrected the problem. Apparently the ZFE sees a disconnected switch as being a signal that the brake is pressed. Maybe this isn't just an off/on switch, but something more inside. Maybe a slight resistance. Does anyone know if this switch is held closed or held open with the brake is not pressed?

WayneC:
Brake switches are usually normally open switches which close when brake is used

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