Ranger 4WD V6-3.0L VIN U (1997)
Lock Cylinder Switch: Description and Operation
IGNITION KEYLOCK CYLINDER SENSOR OPERATION
Ignition keylock cylinder sensing is provided by monitoring the status of the ignition lock cylinder when the ignition is OFF. The keylock cylinder
sensor "clip" located within the ignition key lock cylinder housing senses if the key cylinder has been removed from a damaged steering column
casting (as is done in most hot wire attempts).
The receiver assembly should normally read 162 ± 40 ohms to ground through the ignition keylock cylinder sensor If the keylock cylinder sensor or
its wiring become open or shorted, the perimeter alarm will trigger even though the theft system may not be armed. If the ignition is in RUN or ACCY
and the keylock cylinder sensor input senses an open or a short, the theft system will not trigger until ignition is turned OFF.
As long as the ignition keylock cylinder sensor and associated wiring remain defective, the system will not trigger again due to this input until the
problem is corrected and battery power is removed and reapplied to the module with a good sensor input. The alarm may then trigger again due to the
ignition keylock cylinder sensor once the resistance changes away from 162 ohms.
