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1994 850 cooling fan problems 850 1994

posted by  mintchaser on  Sat Sep 4 09:24 CST 2010
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last visit: Fri Sep 24 12:28 CST 2010
[RELATED]

just found out the cooling fan on my trusty 850 isn't functioning sitting at traffic lights the other day.
I have figured out the wiring and the relay etc,and tested the coolant sensor off the car,which checks out fine for resistance and temperature.
the fan itself works at both speeds, using a direct connection from the battery,and the relay itself is working as it should.
The car as no AC which from what I have read can be part of the fans function.
The two feed wires coming from the ecu, to the relay are not producing any voltage,right up to the point of when the coolant almost boils,could this just be the wiring or the ecu itself that is past it,or is their a component in the ecu itself like a small relay that could be replaced.
The main power,a red cable that leads to the battery is getting no power,but for the life of me I can't find the fuseable link,running a feed straight from the battery to the power point produces no fan action.
I get the feeling with this problem, it might a case of rigging up some sort of thermostatic switch to turn the fan on and abandon the original system.






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