Heated Seat Operation

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

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.