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Home >> Lincoln >> 2019 >> MKZ Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Steering Column Switches >> Steering Wheel And Column Electrical Components (Except Hybrid) >> Description And Operation >> Steering Wheel and Column Electrical Components - System Operation and Component Description >> Component Description >> Push Button Ignition Switch
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Push Button Ignition Switch

The ignition switch is a momentary dual contact switch that is hard-wired to the BCM and PCM. Both sets of contacts are normally open and receive voltage at all times. When the ignition switch is pressed, one set of contacts supplies ground to the BCM and the other set of contacts supplies voltage to the PCM.

The ignition switch also uses a LED to indicate the ignition state.

The ignition switch is part of the GSM and cannot be serviced separately.