Battery voltage is applied at all times for the radio clock and memory circuitry through the DOME fuse. The clock and memory functions need to be reset if the voltage source is interrupted for any reason.

The battery voltage is applied through the CIG fuse to the radio with the ignition switch in the ACC or the ON position. Voltage is applied through the switch to power all electronic radio functions when the radio ON/VOL control is turned to the ON position. The radio is permanently grounded at G200.