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Old 05-19-2005, 01:32 AM
Fourt1thirty Fourt1thirty is offline
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If a switch turns turns the fan on and it doesn't blow the fuse then the fan is almost always good. The fan fuse is the one on the far right of the fuse box. Contrary to what seems to be popular belief, there is no fan relay. The fan circut is insanly simple. The current path goes +, fuse, switch, fan, - That's EVERYTHING that runs the fan (except in A/C cars, which have another switch that jumpers the main switch).

The biggest causes of a dead fan:

Dead switch: Test it by removing it, checking continuity, drop it in a pot of boiling water, give it a few minutes, test again. If it doesn't have continuity between the pins, it's bad. Make sure you're testing the right switch, I've seen people get confused with all the switches on the car. You want the one that screws into the radiator.

Low coolant: You'd be surprised how often I find a 'bad fan switch' to really be low coolant. If the coolant gets below the switch it wont get hot enought to turn the fan on. While this seems crazy, the switch is actually quite high in the system.
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