Zündschalter

A Zündschalter, or ignition switch, is a crucial component in most internal combustion engine vehicles. Its primary function is to control the electrical power supply to various systems, most notably the engine's ignition system and starter motor. When the key is turned, the Zündschalter completes specific electrical circuits. In the "off" position, all power is cut. Turning the key to the "accessory" or "acc" position typically powers non-essential components like the radio or power windows without running the engine. The "on" or "run" position provides power to the ignition system, fuel pump, and other engine management systems, allowing the engine to operate. The final position, often labeled "start," engages the starter motor, which cranks the engine to initiate combustion. Once the engine starts, the driver releases the key, and it springs back to the "on" or "run" position. Modern vehicles may incorporate electronic ignition switches that respond to a button press or proximity key, but the fundamental purpose of controlling electrical power distribution remains the same. Failure of the Zündschalter can prevent a vehicle from starting or cause it to stall while running.