Radiator fan not working 328ci manual???

[dslim88]

I have a 2000 328Ci manual and the radiator fan does not cut on. It doesn't cut on with the A/C on or when the car gets hot (car will evently run hot). How do I test the fan to see if it works or if it's just the temperature sensor or a swtich? And if I have to replace the whole fan how difficult is it to replace myself?
Thanks for any info and help!!

[darkhorse737]

follow the wire that comes out of the fan motor and disconnect at the connector. apply a 12Volt voltage and see if it turns with a "whoooooosh". YES, then fan motor is ok... NO, or turns sluggish; it's time to replace.

There are no relays or switches; fan is controlled by the IHKA module.

Guesstimate time to replace a fan motor for DIY.. 2-3hrs

[dslim88]

Thanks for the info...I'll try that this weekend.

[dslim88]

What is a good way to apply 12 volts to the fan? Should I just use a car battery?

[darkhorse737]

12Volts from battery is the most logical way