XT-6 2WD L6-2.7L SOHC (1989)
Ignition Switch: Description and Operation
Ignition Switch (ON)
The ignition switch "ON" signal informs the ECU that the key is on and power is needed at computer controlled components.
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.