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temp guage acting up 700

posted by  brendan on  Wed Feb 27 04:15 CST 2002
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last visit: Wed Oct 11 14:39 CST 2000
[RELATED]

If the wires short to ground, the temp goes full HOT.

The warmer the coolant temp, the lower the resistance in the sensor, and the warmer the reading on the gage. Ground = zero resistance (or almost 0)


Mine did this for about 3 months before it just totally died full cold. Use a multi meter to check the resistance across the sensor when it is acting up. If the resistance is jumping all over, just replace the sensor.

I spent about $30 from the dealer (newer 2 wire style on mine)
The gage coolant sensor is under the intake manifold toward the front of the engine. The FI coolant sensor is toward the back (under the intake man).


Brendan
'90 745t m46






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