What is a 2 Wire Flasher Wiring Diagram and How Does It Work
A 2 Wire Flasher Wiring Diagram illustrates the basic setup for a thermal flasher unit, commonly found in older vehicles or certain aftermarket applications. This type of flasher relies on a heating element and a bimetallic strip to create the blinking action. When power flows through the circuit, the heating element warms the bimetallic strip, causing it to bend and break the circuit. As it cools, the strip straightens, reconnecting the circuit and allowing the flashing to repeat. This consistent on-and-off cycle is what makes turn signals and hazard lights so effective. The two wires in this diagram typically connect to the power source and the turn signal bulbs. One wire, usually labeled 'B' (Battery) or '12V', connects directly to the vehicle's electrical system, providing the necessary power. The other wire, often labeled 'L' (Lamp) or '2', connects to the turn signal switch and then to the actual turn signal bulbs. When the turn signal lever is activated, it directs power through the flasher unit and out to the appropriate bulbs, initiating the flashing sequence. Here's a simplified breakdown of the connections you'd find:- Wire 1 (Power Input)
- Wire 2 (Output to Lights)
| Flasher Terminal | Connection Point |
|---|---|
| B (Battery) | 12V Power Source |
| L (Lamp) | Turn Signal Switch/Bulbs |