Originally Posted by cadiwa
According to the Evans Tempcon AC drawings there is a relay (energized by the pressure switch) which signals the ECM when high or low engine fan is required. My engine fan runs on high all the time, AC on or off. Does anyone know where this relay is so I can check it out.
This should help. Looking at the front of the radiator it should be at the lower right hand corner. Pull the wires and clean and apply so electrical grease before replacing the wires.
Signal light beeper
You may have to call for parts
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