As you can see from the above diagram, fuse S180 (far left on battery) supplies power to the fans and the Control Module.
Pulling the fuse cuts power to those items.
Pulling fuse #16 inside the car, cuts power to the Module. Both cases the fans shut off.
The module receives inputs from sensors and switches and turns the fans on accordingly.
Depending on which air conditioner system you have, there are different sensors that check the pressure in the system. A fault with that sensor or wiring could
trigger the Coolant Fan Control Module to turn the fans on.
Leave fuse #16 (at the side of the dash) out and run engine to see if the fans come on via the "Radiator Fan Switch" (on the side of the radiator by the battery) if the radiator hoses feel too hot after some time and the fans have not come on. Turn the engine off and let cool down.
The fans should still come on since fuse #S180 supplies power to the low speed take the car to an air conditioner specialist to get the system checked out.
Thursday, December 27th, 2012 AT 11:33 PM