The following components supply voltage to the radio at all times:

CKT 340 (ORN) provides voltage for the radio station and clock memory storage. Turn the ignition switch to the ACCY position or the RUN position in order to supply voltage to the radio through the RDO IGN fuse 24 and CKT 1301 (DK GRN). CKT 1050 (BLK) provides the ground path to G203 and G204.

When the headlamp switch is in the PARK position or the HEAD position via the following components, the radio display illumination voltage is variable:

CKT 1050 provides the ground path to G203 and G204.

Speed compensated volume, if equipped, is controlled by a vehicle speed signal provided by the powertrain control module (PCM)/vehicle control module (VCM) to the radio and through CKT 389 (DK GRN). As speed increases, so does the volume. Each notch of the control ring of the radio allows for more volume compensation.

For chevrolet and GMC when the radio is turned to the ON position voltage is provided to the following components:

The remote audio player ground path is provided by the following components:

For oldsmobile the following components supply voltage to the remote audio player at all times:

The remote audio player ground path is provided by the following components:

For chevrolet and GMC (except envoy) when the headlamp switch is in the PARK position or the HEAD position via the following components, the remote audio player illumination voltage is variable:

The data communication between the radio and the remote audio player is provided by CKT 835 (DK GRN).

The low level audio output signal from the remote audio player to the radio is provided by the following components:

The following components supply voltage to the amplifier at all times:

When the radio is turned to the ON position battery voltage is available to CKT 145 (DK GRN) and the amplifier. CKT 1050 (BLK) provides the ground path to G206. The variable low level audio signals from the radio are amplified and delivered to the speakers.

The amplified audio signal to the speakers is provided by the following components:

Voltage to the rear seat audio module is provided by the following components:

The voltage for button illumination is provided by the following components:

CKT 1050 (BLK) provides the ground path to G206.

Data communication is provided by CKT 1011 (DK GRN) from the rear seat audio module to the radio. This allows for control of the following features:

When the rear seat audio module is requested ON, power-on signal voltage is available to CKT 1011 (DK GRN) and the radio. The radio then supplies battery voltage to the following components:

The voltage provides the following functions:

The rear seat audio module provides two headphone jacks with volume controls for each headphone jack output. Balancing of the audio signal is not required.