Suburban 3/4 Ton 4WD V8-379 6.2L DSL (1985)
Neutral Safety Switch: Description and Operation
Fig. 12 Mechanical neutral start system, shown in Park position
On some automatic transmission equipped vehicles, the actuation of the ignition switch is prevented by a mechanical lockout system, Fig. 12, which
prevents the lock cylinder from rotating when the selector lever is out of Park or Neutral. When the selector lever is in Park or Neutral, the slots in the
bowl plate and the finger on the actuator rod align, allowing the finger to pass through the bowl plate, in turn actuating the ignition switch, Fig. 12. If the
selector lever is in any position other than Park or Neutral, the finger contacts the bowl plate when the lock cylinder is rotated, thereby preventing full
travel of the lock cylinder.
