Steering Wheel Radio Control Switches
The steering wheel control switches control the following radio features:
| • | The preset stations |
| • | The cassette player |
| • | The volume |
| • | The station frequency |
Voltage is supplied to the RH steering wheel controls through the STG WHL CNTRL Fuse 3 when the ignition switch is in the ACCY position or the RUN position or the RAP mode is active. The switches are a ladder network consisting of the switches and a series of resistors. The ladder network allows each switch to have a different resistance. The different resistances allow a different voltage output to the radio.
The steering wheel control (SWC) switches use incandescent backlighting. Voltage is supplied to both steering wheel controls for the switch incandescent backlighting through the STG WHL CNTRL Fuse 13. The illumination signal circuit is a pulse width modulated (PWM) signal from the headlight switch. The bulbs are serviceable.
SIR Coil Assembly
The SIR Coil Assembly contains 6 wires, four of which are used by the SWC. The SWC allows voltage to be sent from the steering wheel switches to the radio while the steering wheel is being turned.
