Steering Wheel Controls

The Steering Wheel controls consist of several components. They include the following:
^ Steering Wheel Radio Control Switches
^ Supplemental Inflatable Restraint (SIR) Coil Assembly
^ Radio

Steering Wheel Radio Control Switches
The Steering Wheel Control Switches control Radio power, volume and station frequency. These switches are actually a ladder network consisting of the switches and a series of resistors. The ladder network is arranged so that each switch has a different resistance. This allows a different voltage output to the Radio for each switch pressed. The Steering Wheel Control (SWC) Switches use incandescent backlighting. The illumination signal CKT 8 is a Pulse Width Modulated (PWM) signal from the Headlamp Switch. The bulbs are serviceable.

SIR Coil Assembly
The SIR Coil Assembly contains four wires used by the Steering Wheel controls. This allows voltages to be sent from the Steering Wheel Switches to the Radio while the Steering Wheel is being turned.