There must be a sending unit somewhere, to properly activate the fan only when needed. I suggest you trace the wires from your fan and hopefuly that will get you there. It may be tapped into the radiator somewhere. Heck, I'm not even sure where mine is! Never really looked. Good luck, hope this helps. -Clint.
A forum community dedicated to Yamaha Grizzly owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Open to all Grizzly models including 700, 660, 600, 350, and 125.