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Discussion Starter #1 (Edited)
Hello,

Just bought a used R1200 GS Adventure and the current problem I am facing is that the brake light is always on. I have read about the problems with micro switches, however, on this bike there are no front and rear micro switches. Just wondering if it is normal or they should be present on all bikes? I was thinking maybe ABS unit has some kind of pressure sensor which detects increased pressure and switches the brake light on? Thank you for your advice
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Update, maybe it will help someone:

I went to a guy who has kind of BMW Service type tool which is more powerful than GS911. So he was able to read codes, change from miles to kilometers, update firmware, etc.

The fault code that we get:
005E20
Control circuit brake pressure sensor, front

Yesterday I went to him again, as I have seen that it is possible to check pressure of the brake circuits with his software.

Please see video attached from the brake engage test:




We first engaged front, then rear brake levers.
It seems that the pressure sensor in the front is faulty. The pressure does not change when engaged, it shows -327.68 bar. Also, I checked the tail light itself. It has two live wires and ground. Both wires are active - that's why the brake light is on. I think the tail light wires comes from board computer if I am not wrong, I wasn't able to found any schematics for this model of GS.
 
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