Ignition Switch Description

IGNITION SWITCH

The ignition switch contains the wiring and electrical switching portion of the column mounted ignition assembly. The ignition switch includes wiring pigtails which connect it to the base of the column connector. The PASSLOCK sensor is an internal resistor within the ignition switch.

The ignition switch receives a 5-volt reference from the body control module (BCM) via the ignition key resistor signal circuit. When in the start position, the 5-volt reference travels through the PASSLOCK sensor within the ignition switch. This creates a unique voltage value which is returned to the BCM via the off/run/crank voltage circuit.