Power Amplifier

The optional amplifier boosts the sound of the four rear speakers in the SUBURBAN when equipped with the premium sound system.

With the ignition switch in ACC or RUN position and the Radio Control Head ON, battery voltage is supplied to the Power Amplifier Relay through the PNK/BLK (143) and ORN (40) wires. The relay is grounded through the BLK (150) wire at the I/P ground G200. When the relay contacts close, battery voltage is supplied to the Power Amplifier through the ORN (140) wire, the ground is completed through the BLK (150) wire at the I/P ground G200.