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Re: Radiator fan won't come on
Have you tried pulling the plug off the sensor at the bottom of the radiator?
Check for corrosion or a broken wire. If all looks OK, try shorting the two
wires together. The fan should run. If not, move on to the cooling fan relay.
Does it click when you short the sensor wires? If not check or replace the
relay. If it clicks the fan motor is next. Does it get power when you short
the sensor wires? If yes and the contacts are clean, the motor may be shot.
If the fan runs when you connect the sensor wires, then the sensor is
probably dead. Happy hunting.