The RH steering wheel control switch controls volume, mute, mode and receives power from the positive voltage circuit. The LH steering wheel control switch controls station frequency, scan and preset. When one of the steering wheel control switches is pressed to the desired function, a network of series resistors allows a different voltage output through the remote user interface circuit to the radio.

The inflatable restraint steering wheel module coil contains two wires used by the steering wheel control switch. This allows voltage to be applied by the steering wheel control switch to the radio while the steering wheel is being turned.