Hombre S Regular Cab 4WD V6-4.3L (1999)
Engine Block Heater: Description and Operation
Coolant Heater Description
The optional engine coolant heater (RPO KOS) preheats engine coolant in order to aid cold weather starting. The engine coolant heater operates from
a 110 The DTC AC power source through a heating element in the water jacket of the engine lock. The heating element warms the coolant as long as
the heater cord is plugged into the AC power source.
The unit has a detachable electrical cord. If the heater fails to operate inspect the following components before you replace the heating element:
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The cord
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The connections
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The power supply