Up to VIN S5219999

The door knob lock switch is located in the driver's door. When the door knob lock switch is locked (pushed down) the driver's door is mechanically locked and a ground signal is sent to the electronic time and alarm control module "lock" input at C220/14. The electronic time and alarm control module will send a 12 V pulse through the GRN wire at C220/10 while simultaneously grounding the RED wire at C220/9. The doors lock. When the door knob lock switch is in the unlocked (pulled up) position the reverse happens. The driver's door is unlocked mechanically and a ground signal is sent to the electronic time and alarm control module unlock input at C220/13. The electronic time and alarm control module will send a 12 Volt pulse through the RED wire at C220/9 while grounding the GRN wire at C220/10. The doors unlock.