Steering Wheel Radio Control Switches

Steering Wheel Control Switch:

The Steering Wheel Radio Control Switches control volume, station frequency and cassette function. These control are a ladder network consisting of switches and a series of resistors. The ladder network is arranged so that each switch has a different resistance. This follows a different voltage output to the radio for each switch pressed.

The Steering Wheel Radio Control Switches use backlighting. The illumination signal circuit 1244 is a Pulse Width Modulated (PWM) signal for the Headlamp Switch.