Steering Wheel Blower Motor Switch

A separate blower motor switch is mounted on the steering wheel to allow the driver to adjust the blower speeds. Power to the steering wheel control switch is delivered from the rear fuse block, through the steering column fuse holder, and inflatable restraint steering wheel module coil on the battery positive voltage circuit. When the driver toggles the blower switch up or down, the voltage is sent through a series of resistors. That varied voltage is sent back through the inflatable restraint steering wheel module coil to the instrument cluster through the remote radio control circuit. Once the instrument cluster receives the varied voltage signal, the information is sent out over the class 2 serial data to the HVAC control processor where the blower speed is adjusted.