Join Date: Sep 2004
Location: Medford, County of Jackson, Oregon, USA
Model: None at present
On the 1100 the brown wire goes to the ignition switch. It's the lead for the tail light. The bulb has two filaments one for the tail light and one for the brake light, the Green/Yellow is the brake light and the green is ground. I'm pretty sure the 1000 uses the same color code. With a voltmeter - lead on the green wire or on a chassis ground and the + lead on the brown wire you should see 12V when the ignition switch is in the run position. Moving the + lead of the volt meter to the Green/Yellow wire you should have 12V when either brake control is operated.
With your aftermarket tail light unit you're going to have to identify which filament is brake and which is the tail light.
None at present
Past 'Wings: GL1100, GL1200, GL1500, GL1800
Current BMW C650GT