on a 98+, they got rid or the CCRM and went to discreet relays. I think they are by the battery. The high and low speed relays are controlled by the PCM. Assuming the wiring is OK, the relays are not fried, and the relay fuses are not blown open, the computer is not signaling the relays to turn on the fans. If you disconnect the dual wire coolant sensors (for testing) the fans should run non stop. Your going to need a DVM and find out where you have power and where you don't.I checked out grammaz 1998 Ford Taurus with the 3.0 Vulcan. I saw water leaking out of the weap hole of the water pump so I assume the water pump is bad. Also the fans don't work when the car is on or when I turn the a/c switch on.
I know for a fact that this car has been rigged up here and there and I really don't want to mess with this car but she wants it running and I decided to tackle it myself.
Well my concern is after I replace the water pump will it still leak like I've been reading about here in the forums, timing chain cover I think it was. Where/how would I get info on how the fans operate? I got out my test light and checked the fans with the engine running. Good ground just no voltage for them to operate. I tried and hot wired each fan straight to the battery and they worked but is this a good way to test if they are bad or not?? Having experience with this car in the past, I remember the fans turning on when you turned the key to on.
Any tips/considerations/advice is greaty appreciated. Thanks.