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Thread: How-to wire two fans for high/low operation.

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    Thanks for the how to video - texzetec A toast to Ron Paul :D - powder To you and your family bud. - RASCAL 

    Default How-to wire two fans for high/low operation.

    You have to use a Bosch automotive 5-pin relay with a normally closed center (87a) pin. Get one rated for at least 30 amps.
    You can use the wires at the stock fan plug for the CCRM labled wires.

    Pin 30 - Fan 1 (+)

    Pin 85 - CCRM Low (green/yellow)

    Pin 86 - Ground (black)

    Pin 87 - CCRM low

    Pin 87a - CCRM high (yellow) and fan 2 (+)
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    Have never see enter low fan speed mode, only high, always.....
    Error 401 - Car not found

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    Will the low fan speed wire allow the fan to turn on quicker than the high fan speed? Also do you know the voltage differences between the two?
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    Low speed comes on before high speed does, so yes this will allow the fan to come on sooner then just using one fan. The voltage difference is the same from the CCRM. The fan itself has the resistor built in to lower the fan speed.

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