Question about 1990 Honda Prelude

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Fan running after car is turned off. car dies and wont start, but its getting power from battery

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There is a fan timer module that runs the fan if the temperature is 194 or hotter. if the module,which has internal relays fails the fan will not shut off.if you want a cheap fix,wire a relay in series with one of the fan wires so that the relay only is activated by a source of switched power from the ignition..that relay will pull about 200 ma only,so wire the relay power to a circuit like a switched power outlet,lighter or other circuit with no computers on it to control the relay.the radio circuit switched power is a good one to use,and make sure to use a 25 amp relay ,as the fan pulls about 10 amps.a bosch 4 pin will work fine.

Posted on Apr 26, 2010

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