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Bmw k100rs cooling fan comes on too early?

Hi to all,
I have reworked my 1986 K100 RS 8 valve by removing the fairing, shortening the frame and fitting old school rear mudguard and seat.
All worked fine before the rebuild but now I have a problem with the cooling fan coming on too early, but only when the lights are on, other wise the fan works as it should.
I have checked all the earthing as far as I can, but can`t
find the problem. Can anyone give me some advise.

Many thanks Ian..........

Ian Phillips
June 2012
BMWBMW K100RSVehicles, Motorcycles
you're the only one that knows what's been done to the wiring, just a case of going back over it to find the fault, have you 'piggy-backed' a lighting wire to the elec. fan wiring by mistake? as there seems to be a 6 way connector that, apart from the others, has a lighting wire and a fan wire to/from it and another wire goes to earth, sorry don't really know much more about this bike, good luck.

Pitkin
July 2012
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