Fan / Radiator ?

kitkat · Postby **kitkat** » Mon Jan 15, 2007 11:00 pm

When the engine is cold... eg off in garage over night. The fans will/should not come on when you start the car. The fans should turn on when the engine reaches operating temperature. Therefore when turning the car off after a drive and returning it to it 5mins later the fans will turn on straight away (because the car is still warm).

The a/c fan will only even turn on when the a/c is on.

The a/c fan is on the drivers side.

If the fan is coming on before the engine is warm it may be a good idea to inspect the wiring, it may have been rewired to turn on straight away. The noise may also be a busted fan. Dissconnect the plug to the fan and see if the noise is still there.

This wiring diagram may come in handy....

Garry · Postby **Garry** » Tue Jan 16, 2007 9:19 pm

Unplug the thermoswitch and check for continuity between the two pins. There should only be continuity when the engine is hot. Sounds like your thermoswitch is stuffed to me.

zoomzoom · Postby **zoomzoom** » Tue Jan 16, 2007 9:19 pm

I would put a multimeter on the thermofan switch on the front of the engine and check if there is a closed circuit when it is cold. If this is the case then it is probably faulty.
You can pay over $100 for a new one, depending on the brand, but you should be able to pickup a alright looking one from a laser or 323 at the wreckers cheap.

zoomzoom · Postby **zoomzoom** » Tue Jan 16, 2007 9:20 pm

Beat me to it Gary, I must be too slow at typing

zoomzoom · Postby **zoomzoom** » Tue Jan 16, 2007 10:43 pm

You can just test it without pulling it out. With the car cold unplug it and put a multimeter across the two pins testing for resistance, if you get a reading then there is a closed circuit and it is not working properly.