Testing 2 speed fan operation - Saab 9000 Bulletin Board - Saabnet.com
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Testing 2 speed fan operation
Posted by zeke (more from zeke) on Sat, 11 Nov 2000 12:44:48
In Reply to: How do I test my '92 9K T's 2-stage cooling fan operation?, Morgan [Profile/Gallery]
, Sat, 11 Nov 2000 10:37:31
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Unplug the connector to the thermo-switch that's located at
the bottom passengers' side of your radiator. There are 3
wires there: the Blue is for the high temp/speed, Blue-White
is for the low temp/speed, and the black is the ground. They
all go to a 4 pin connector (H4-13) where pin 1 is the low
speed, pin 2 the high, and pin 3 is ground - pin 4 should
be empty. With the ignition on, place a jumper wire across
pin 1 and 3, and your low speed fan should start. If it doesn't,
check the fuses and the relay (pin 2/85) on the box next to the battery.
If it's not the thermo-switch, the fuses or relays, then it might
be the fan or its' resistor.
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