Question about 1997 Saab 9000
The thermoswitch, if there is one*, is located on the lower portion of the radiator just in front of the turbo outlet pipe. Here is a picture: http://quasimotors.com/fanswich.htm
The other "radiator" is probably your A/C condenser.
You have a 1997 which is T5 engine management (begun in 1995), so there is no thermoswitch because the fan is controlled directly by the ECU from the signal given by the coolant temperature sensor. I would suspect that one of the fan relays has bought the farm. (On some cars, there were two relays, one for low speed and one for high). Here is a picture: http://quasimotors.com/cooling_fan_relays.htm
For general diagnostics of the cooling system, go here: http://quasimotors.com/coolfan.htm
2 stage cooling fan wiring diagram here: http://www.thesaabsite.com/9000/9000-fan-wiring.pdf
This also will tell you where to find other components to check, like the fan speed resistor, and provide other diagnostic checks.
Posted on Nov 25, 2008
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