Quote:
I would definitely test it with a resistor. Go to radio shack or other electronics parts store and get a 3k or 3.3k ohm resistor. Unplug the sensor and put the resistor across the two leads. Turn the key to the on position and look at the gauge. It should read ~70F (25C) constantly (no fluctuations)
If it does, then the sensor is the problem. If it doesn't (and still reads +20 degrees) then its likely the display/electronics contained there.
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Tried the 3.3K Ohm resistor and nothing on the display with the car running. Anyone know where I can find an LED display?
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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles
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