Door Locks: Description and Operation

Voltage is applied at all times through fuse 44 to the power door lock control unit. The control unit is grounded at G403.

When you press the driver's (or passenger's) door lock switch to the LOCK position, a path to ground is supplied to one of the control unit's lock inputs. The power door lock control unit then applies voltage to the door lock actuators, and both doors lock.

When you press the driver's (or passenger's) door lock switch to the UNLOCK position, a path to ground is supplied to the control unit's unlock input. When voltage is applied to the door lock actuators, the polarity of the voltage applied to the actuators is reversed, and both doors unlock.


Lock Switches


When you push the driver's (or passenger's) door lock switch to the LOCK and then to the UNLOCK position, both doors lock or unlock.

With the ignition key in, neither door will lock when you push the driver's (or passenger's) door lock switch to LOCK.


Key Cylinder


When you insert the key into the driver's door key cylinder and turn it to the LOCK position, both doors will lock. When you turn the key to the UNLOCK position, only the driver's door will unlock.

When you insert the key into the passenger's door key cylinder and turn it to the LOCK position, both doors will lock. When you turn the key to the UNLOCK position, both doors will unlock.


Knob Switches


When you push the driver's door lock tab in, both doors will lock. When you pull the tab out, only the driver's door unlocks.

When you push the passenger's door lock tab in or pull it out, only the passenger's door locks or unlocks.