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View Full Version : How-to wire two fans for high/low operation.


ZX2Fast
06-03-2008, 02:55 AM
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 (+)