Wiring And Schematic

This car headlight alarm circuit can be set for one or two functions:
First, to indicate that the head lights (or the side lights) should be switched off after switching off the ignition contact. With this circuit, there should be no dead battery due to headlights that were left on.
Second, to indicate that the head lights should be on once ignition contact is switched on.

Car Headlight Alarm Features:

• Continuously repeated alarm tone for lights ON (may be disabled)
• Repeated alarm tone for lights OUT
• Only 3 wires are required for hook-up