SOURCE: Toro Z Master Cooling fan will not turn on.
i would check water temp sender in engine block or thermostat housing.take wire off with key switch in on position touch wire to clean ground tis completes ground curcuit to relay fan should come on if so test sender with test lite or ohm meter. should be open curcuit or no lite when cold and go complete or lite when comes up to temp. clamp test lite to sender and probe to positive. hope this helps
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