When the radio is turned on voltage is applied from the radio (circuit 314) to the radio power antenna internal relay coil. Ground to the relay is supplied from G200, circuit 650. The relay contacts close, and battery voltage (from the RADIO ACCY Fuse 4, circuit 1040) is applied to the motor. Terminal B of the motor is grounded through the up switch and the relay contacts. The motor drives the antenna mast up. When the antenna is at its full height, the up switch opens and the motor stops.

When the radio or ignition switch is turned off, voltage is removed from the relay coil. The relay contacts open, applying battery voltage to the motor. The motor terminal A is now grounded. The down switch at the antenna now has voltage applied through the relay, the voltage of the motor has reversed polarity. It runs in the opposite direction, retracting the antenna mast.

At the end of the antenna's travel, the down switch opens and breaks the current flow. Both sets of switches are now in the places shown in the schematic, the radio is off and the antenna mast is down.

The antenna is connected to the radio by coaxial cable.