Unlocking

The unlocking operation is similar to the locking operation except that the polarity of the voltage applied to the door lock actuators is reversed. The completed circuit causes the actuators to run in the opposite direction, which unlocks the doors.

Setting a front door lock switch to the UNLOCK position provides an input signal to the PZM on the following circuits:
^ CKT 781 (ORN/BLK)
^ CKT 245 (DK BLU)

The switch grounds a terminal on the PZM to ground the following circuits:
^ CKT 151 (BLK/WHT)
^ CKT 51 (BLK/WHT)

The PZM provides two output signals that accomplish the unlocking function.

On one circuit, the PZM provides an output on CKT 194 (WHT) that grounds the unlock coil of the power door lock relay. The unlock relay contacts close, providing power from the CONVENIENCE fuse to the right front and the rear (on the four-door models) door lock actuators through the closed relay contacts and CKT 294 (TAN).

The voltage to unlock the left front door lock actuator is applied through the left front door unlock relay. When unlocking, the PZM provides an output on CKT 1391 (LT GRN) that grounds the coil of the left front door unlock relay. Voltage on CKT 2040 (ORN) energizes the relay coil. The CONVENIENCE fuse supplies the power to the front door lock actuator through the following components:
^ CKT 2040 (ORN)
^ The closed relay contacts
^ CKT 694 (TAN)

All of the door lock actuators run because the actuators are grounded through the following components:
^ CKT 295 (GRY)
^ The lock relay contacts of the door lock relay
^ CKT 1250 (BLK)