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Bad Cooling Fan or Relay? 850 1995

posted by  deltaclipper on  Mon May 17 15:51 CST 2004
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Well, in following your directions, I discovered that the thermocouple (sensor)at the thermostat was bad, and have replaced it. Along with the radiator after it sprang a leak! Soooooo, for 2 days it works correctly, but now I have no fault codes on A2 (or any others) but no fan again.

When I short the relay to ground, I get high and medium as normal, but even with the proper ohms being fed from the new sensor, the computer is still showing either some resistance on the high (yellow wire) when it should be to ground. Is this a bad ground on the ecu, or bad ecu? Do I have to recalibrate the ecu to the new sensor?

Very stuck.....
Alan.





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