cooling fan problem anways goes on/off/on/off...

[morenc00]

problem started today, fan always starts and stop, i'm guessing the system is controlled by an normally closed sensor and I have a cut wire somewhere (thanks to that damn WV vire cover) giving an open signal?

here is my questions

where is the fuse for the fan (it's pretty cold out there so I don't need the fan right now) ?

where is located the temp sensor?

where the wire usually cut?


thansk

michel

 

[Dick_Larimore]

Although you used the word "fan", I assume your car has two radiator fans and is equipped with A/C. Both of the cooling fans should be on whenever the A/C is running. A coolant fan control switch screwed into the radiator on the lower driver side (North American vehicle) turns both fans on low speed (red/white lead to power fans). The low speed is powered thru a 30 amp green fuse, S180, on top of the battery (far left of the three green fuses). The low speed control works on radiator temp and is independent of the A/C.

The coolant fan control module located below the driver headlamp powers both fans at high speed thru the red/black wire to each fan whenever the A/C is on. Fuse S164 is a 40 amp metal strap fuse located on top of the battery for the high speed fan operation. The ground connection to each fan is the brown/black (or solid brown) wire.

Intermittent fan operation could mean that the coolant fan control switch is defective.

 

[morenc00]

thanks to the info I will check it this morning before leaving for the job

 

[morenc00]

needed to remove both fuses to stop the fans running.... so my coolant fan control module is shoot, dealer price for that part 215$ CAD....there is always something unexpected that fails nearly every 2 weeks on that car, this car will never stop to impress me........

 

[sodapop6620]

Have you recently changed the coolant? There could be an air pocket near the sensor, so it is seeing air temp inside the radiator and not coolant temp. Or it may be just a bad temp sensor in the radiator.

 

[morenc00]

I removed the control module yesterday, there was some rust leaking from it, when I opened it one of the 2 relays was rusted and the spring was broken, I cleaned it, put a new spring on it. it should work till I recieve my new module from e-bay about 50% cheaper than dealer.