eiger fan does not turn off

terrilarry · March 24, 2014

Went for a ride today with some new tires and my bike is pretty dirty. I don't have a high temp light, but when I turn my key to on, my fan runs even with the engine off. What can cause this?

Mudflap64 · March 24, 2014

Bad temperature sensor, shorted wire, or if yours has it, a bad fan relay that is sticking in the on position. Thats off the top of my head.

Tim-ANC · March 24, 2014

I`d go for the thermo switch first. Check for continuity in and out of it cold. Open circuit good. Closed circuit bad.

Looking at my 09KQ WDM there is not a relay in the control system. Just the switch and a fuse. What year is your Eiger?

terrilarry · March 24, 2014

It's an 05, where is that switch located?

Tim-ANC · March 24, 2014

Item 1 according to bike bandit.

2005 Suzuki Eiger Auto 4WD LT-A400F Parts, 2005 Suzuki Eiger Auto 4WD LT-A400F OEM Parts - BikeBandit.com

terrilarry · March 24, 2014

Ouch $70. How much of a problem is this really? The fan is running, and everything else is running fine.

Tim-ANC · March 24, 2014

It will lower the service life on your fan. Check the switch first. Might be a different problem. Also that is bike bandits list price. You can probably get one cheaper else where.

terrilarry · March 26, 2014

I unplugged the switch and the fan stopped coming on, plugged it back in and back to coming on. I tapped the switch with a wrench however and not it had stopped. I guess now I have to get the bike hot and see if it comes on?

Tim-ANC · March 26, 2014

At least you narrowed the problem down to the switch. Sounds like it was stuck closed. Now will it be stuck open? Yes run it but don't stray too far. If you get an overheat light and the fan doesn't come on you'll need to shut it down for a while.

terrilarry · March 26, 2014

Well I ran it until the fan came on, shut it down then this morning just on a hunch tried it and sure enough the fan came on so back to square one.

Tim-ANC · March 26, 2014

I think you troubleshot it to the switch. Sounds like it got stuck closed again. Verify with a continuity check on cold engine and start shopping for one. I dont have a manual for your rig. Might need to drain the oil.