how do i test the engine cooling fan? on 2000 Ford Taurus

i'm looking at a 2000 ford taurus which the current owner says begins to overheat in about 15 minutes. i'd like to test the engine cooling fan to see if that is where the problem lies. how do i go about doing that?

by in Modesto, CA on September 02, 2010
1 answer 5 comments
ANSWER by on September 02, 2010
Jump or hot wire the fan to the battery thus bypassing the relay. Trace the wires so you know which is hot and which is ground. If the fan spins when you hot wire it the fan is not the problem. May be the relay or blown fuse. Good luck.
COMMENT by on September 02, 2010
thanks for your quick response. i'll try that. do you think it would help to turn the ac on to see if that kick-starts the cooling fan? i'm thinking possible bad sensor, too. also, do you know of any problems i should be looking at with this car?
COMMENT by on September 02, 2010
I don't think the fan automatically comes on when you turn on the a/c but the engine will warm up quicker thus causing the fan to come on quicker. First check the fuse, then the relay. It could also be a temp. sensor like you say. Make sure all the wire connections are good. It could be a bad ground wire also. Usually though, it turns out to be the relay.
COMMENT by on September 02, 2010
are we talking about the relay in the accessories relay module? or is there one on the 2000...i'm so used to my 1995...:) cause the accessories relay module (at least on the 1995) is over $80 at Kragen...if that may be the problem i'm going to have to offer less for the car.
COMMENT by on September 02, 2010
Yes, the relay under the hood, but first determine whether the fan is working. If the fan works and kicks on by itself then it could be a stuck thermostat or even a faulty radiator cap. If the cap is bad it won't let the system build up enough pressure to circulate the coolant. If all that checks out then your probably looking at a water pump. I would prepare for the worst and make may offer accordingly. Let me know how you make out.
COMMENT by on September 02, 2010
thank you for you help...much appreciated.

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