duck
Life time member
Number of posts : 4477
The most effective way to know if the OEM fan is working is to jump 12V to its connector. 12V+ to the violet/yellow wire, ground to brown.
If that works then a fan not coming on problem is caused by something else being amiss.
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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT