Blazer 2WD V6-4.3L VIN X (2004)
Seat Heater: Description and Operation
HEATED SEATS DESCRIPTION AND OPERATION
HEATED SEAT SYSTEM COMPONENTS
The heated seats system consists of the following components:
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Heated seat switch
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Driver heated seat relay module
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Passenger heated seat relay module
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Driver heated seat thermistor
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Passenger heated seat thermistor
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Driver back cushion heater element
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Driver seat cushion heater element
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Passenger back cushion heater element
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Passenger seat cushion heater element
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Passenger seat belt switch
HEATED SEAT SYSTEM CONTROLS
The heated seats are controlled by the following components:
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Headed seat switches
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Heated seat modules
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Passenger seat belt switch
HEATED SEAT OPERATION
Ignition voltage is supplied to the heated seat switches. When a heated seat switch is turned on, voltage is supplied through a resistor in the switch to
the heated seat switch signal circuits and then to the heated seat module. Battery positive voltage and ground is supplied to the heated seat module for
the heated seat elements. The seat heater module monitors the seat surface temperature through a thermistor located in the center of the seat back.
With the heated seat switch turned on and the resistance through the heated seat thermistor within acceptable limits, the module closes an internal relay
and battery positive voltage is then supplied to the seat heater elements. The passengers heated seat will not operate unless the seat belt is connected.
This is a safety feature that ensures the seat will never remain ON.
