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Ignition Switch: Description and Operation
Ignition Switch (ON)

PURPOSE

The ignition switch "ON" signal informs the ECU that the key is on and power is needed at computer controlled components.

OPERATION

When the ECU receives 12vdc from the ignition switch it supplies the ground for the ignition relay. The relay then provides power for the ECU.

Starting and Charging > Sensors and Switches - Starting and Charging > Ignition Switch > Component Information > Description and Operation > Ignition Switch (ON)

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