K11 Owners Group

John Clauss · Posted: Fri Jul 17, 2015 6:56 pm Post subject: New rear brake MC now brake light

So today I installed my new rear master cylinder for the RS. All was well and the rear brake works again! Now the brake warning light is not going off and the rear brake is not activating the brake light. I am thinking it is something with the switch. I checked and the little touch pad is clearing when the brake is applied.

Is there any easy was of testing the switch with it still on the bike? I had a heck of a time getting all together by myself.

Thanks in advance!
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1997 K1100LT
1975 R75/6

It will bring you so close to nausea, it will make you sick! - Big Al

rbm · Posted: Fri Jul 17, 2015 10:07 pm Post subject:

Have you read this? To test the brake light switch, you'll need a multimeter with a continuiity tester. The switch is connected to the harness under the right battery cover. Undo the connector and test the continuity between the exposed terminals on the wire leading to the switch. When the brake pedal is in the normal position, there should be open circuit (no continutiy). When the brake gets applied, there should be continutiy (short circuit or very low ohm reading). If your brake check indicator is lit all the time, the switch is not releasing properly, meaning probably an adjustment.
_________________
- Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer

John Clauss · Posted: Sun Jul 19, 2015 10:57 am Post subject:

The fix was even easier. At some point the wire had become unplugged. 2 second fix. Embarassed

John
_________________
1997 K1100LT
1975 R75/6

It will bring you so close to nausea, it will make you sick! - Big Al