Antenna: Description and Operation

When the Radio is turned ON, voltage is applied from the PNK wire to the Antenna Relay coil. The Antenna Relay contacts close and the battery voltage is applied to the DK GRN wire and then to the Antenna Motor. The other motor terminal is grounded through the UP switch, the GRY wire, and the relay contacts. The motor drives the Antenna up. When the Antenna is completely extended, the UP Switch opens and the motor stops.

When the Radio or Ignition Switch is turned OFF, the circuit is opened through the Antenna Relay coil. The contacts open to the position shown in the schematic, applying battery voltage to the WHT wire. The DK GRN wire is now grounded. Since the DN Switch, at the Antenna, is now making contact with the WHT wire, the voltage to the motor has reversed polarity. It runs in the opposite direction and drives the Antenna down. At the end of its travel, the DN Switch opens the circuit. With the Radio OFF and the Antenna down, both sets of switches are now in the positions shown in the schematic.

The Antenna is connected to the Radio by a coaxial cable.