Optical Horn

CIRCUIT OPERATION
The operation of the optical horn is the same as the HIGH beam headlamps, except for the beam select switch is held momentarily.

When the operator selects optical horn, with the beam select switch, a ground path is completed on circuit L324 from the HIGH beam relay through the switch to ground on circuit Z1. The Z1 circuit terminates at the instrument panel ground.

The ground path on this circuit causes the contacts in the HIGH beam relay to CLOSE connecting a direct battery feed to fuse 24 and 25.

Both the relay and the fuses are located in the Power Distribution Center (PDC).

Circuit L33 connects from fuse 25, a 10 Amp., to the HIGH beam of the left headlamp. Ground for the lamp is supplied on circuit Z1 and terminates at the left cowl.

Circuit L34 connects from fuse 24, a 10 Amp, to the HIGH beam of the right headlamp. Ground for the lamp is supplied on circuit Z1 and terminates at the right cowl panel.

Circuit L34 is spliced and provides a HIGH beam ON input to the message center.