Is the fan on a relay or a ground interrupt?

akunochi · Apr 12, 2015

I am trying to figure out if the fan is on a relay a la 1098/1198 or a ground interrupt from the ecu a la 999 series. What I'm attempting to do is add a manual override switch into the circuit so that while it can be triggered on at 217 by the ecu, I can also flip it on manually for expected slow downs and traffic etc.

Seth

bp7178 · Apr 12, 2015

The fan uses the same general ground as several other components. However, it looks like its driven from pin 1 of the BBS under the seat, thus the BBS looks like its acting as the relay.

The wiring diagram is a part of the owner's manual.

akunochi · Apr 12, 2015

Thanks BP. I am away from home and my bike right now so I appreciate you looking that up. If this is part of the bbs it may be more complicated than I originally hoped.

bp7178 · Apr 12, 2015

I would think you could just tap in another switched +12V lead, but I don't know how much it would help. The airflow wouldn't mean much if the water pump wasn't flowing the coolant as is at idle.

Is the fan on a relay or a ground interrupt?

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