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cooling system, fan won't kick on

Old 05-08-2012, 04:13 AM
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cooling system, fan won't kick on

Anybody have an ideas as to why the fan wouldn't come on? Got the coolant filled an bled I believe, following this site an the service manual. I start the engine, let it idle...temp rises an rises, gets past middle point on dial an keeps climbing. No fan. Thermal protection eventually shuts off the engine. Fan is plugged in, fuse is good.
So what's my next move?
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Old 05-08-2012, 06:31 AM
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Have a look at chapter 19-18 in the service manual. I believe there is a ground wire coming off the connector near the fan motor. It could have been left unbolted or loose. Corrosion at the ground would also cause the fan to not work. Also, the fan switch may not be connected or faulty. It closes the circuit on the ground side.

I may be uninformed, but I do not know of any thermal protection that will shut the engine down from overheating.
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Old 05-08-2012, 08:18 AM
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Yeah, def thermal protection cause the first time I just let it go to the red zone an it shut down automatically...a lot of bikes have it in case the thermostat or whatever fails...
But ok thanks for the advice...that's where I'll start when I'm off work
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Old 05-08-2012, 08:21 AM
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BTW a lil back info, never had this problem till I removed the clutch cover to replace the gasket behind it...had to remove right fairing an that sensor bolted into the cover cause I couldn't locate the other side to unplug it...
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Old 05-09-2012, 09:32 AM
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It was the Fan thermo switch. Found out after beerhunters advice...an burning the living **** outta my fingers when I jumped the wrong plug to the frame with a twist tie lol
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Old 05-09-2012, 09:42 AM
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Originally Posted by Bandit400man View Post
It was the Fan thermo switch. Found out after beerhunters advice...an burning the living **** outta my fingers when I jumped the wrong plug to the frame with a twist tie lol

HAHAHAHA Those twist ties heat up pretty quickly don't they?
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Old 05-09-2012, 03:55 PM
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Yeah...****** got red hot befor the pain even registered LOL...lucky for me I got tons of vichoden for when my buddys 4wheeler crushed my head and fractured my skull...

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Old 05-09-2012, 04:06 PM
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OUCH! Anyway don't feel bad my brand new superhawk back in '99 overheated with 50 miles on it the day it came out of the crate because of a faulty fan switch.
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Old 05-09-2012, 04:10 PM
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Ohhhh...so its lika...thing huh? LOL Yeah I coulda swore I didnt fudge it up or anything...like, WTF? LOL an there expensive too! Ron wanted @$45 after shipping...that's an OUCH! LOL
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