Thanks for the info. Ill check out the sensor. As far as the resistor, if it is broken it should stop current flow because I did get the fan to come on for a short period by bypassing the resistor which is what led me to believe that is the problem. I will order new resistors then try that and see if that helps. If not then its on to the sensors.

brockley

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89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights