The window release system is provided with positive battery voltage (B+) continuously through the following components:

When the correct control inputs are received, the body relay block provides B+ at terminal D12 through CKT 56 (BLK/WHT) to the lifgate/endgate window release actuator terminal A. The lift window release actuator is provided a ground continuously from terminal B through CKT 1350 (BLK) to G450.

The body relay block provides B+ to the liftgate/endgate window release actuator in order to allow for a remote or non-remote operation.

For the remote operation, the body control module (BCM) monitors various inputs. The BCM then provides the necessary output to remotely operate one of the control-side functions of the lift window release system.

The BCM must have power and ground continuously. The BCM requires there be no voltage present at a circuit that is normally hot in the run position or in the crank only position.

In a vehicle with an automatic transmission, the BCM must receive a signal that the transmission selector is in the PARK or the NEUTRAL position. If the vehicle has a manual transmission, the BCM must receive a signal showing that the park brake is applied.

If the vehicle has remote keyless entry (RKE), and the transmitter has been activated, the BCM must receive a request from a Class 2 serial data signal. The remote control door lock receiver provides the signal. Refer to Keyless Entry System Circuit Description in Keyless Entry.

If all the required input conditions for correct operation exist, the BCM allows remote operation of the lift window release from either a switch inside the vehicle or from a RKE system.

If any of the required input conditions do not exist, the BCM will prevent a remote operation of the system.

Important: The system has a second, non-remote function. Because of the second function, the BCM does not prevent the system from operating outside of the vehicle when you use the endgate/liftgate lock cylinder switch.

A rear wiper washer and endgate/liftgate window release (REAR HATCH) switch is located on the instrument panel (IP). The REAR HATCH switch is a manually controlled momentary contact switch. The switch is normally open.

The REAR HATCH switch is connected from terminal D through CKT 1576 (BLK) to the BCM connector C3 terminal B1.

The REAR HATCH switch is provided a ground continuously from terminal E through CKT 1050 (BLK) to G203. Another ground redundant to the lift window release switch circuit is provided from G203 through CKT 1050 (BLK) to G204.

When the REAR HATCH switch is depressed, a ground is applied through the closed contacts of the switch. A ground present at the BCM connector C3 terminal B1 is interpreted by the module as a request signal from the REAR HATCH switch.

Upon receiving a request signal from the REAR HATCH switch, the BCM monitors other inputs to determine if the conditions for operation exist. The following actions occur if all of the required conditions exist:

The BCM connector C2 terminal A6 provides ground through CKT 1344 (LT BLU) to the following components:

The following conditions exist:

The following components are involved in the non-remote controlled function:

B+ is provided at the body relay block terminal D11 through the following components during non-remote operation of the system:

The liftgate/endgate lock cylinder switch is located in the endgate/liftgate. The liftgate/endgate lock cylinder switch is key operated and manually controlled. The door lock cylinder switch is a momentary contact switch that is normally open. The door lock cylinder switch is part of the left, front door lock actuator. It is closed when the left front door is unlocked, and is open when the door is locked.

The body relay block supplies B+ continuously from terminal F10 through CKT 840 (ORN) to the liftgate/endgate lock cylinder switch terminal D. When the switch is closed, the lock cylinder switch supplies voltage from terminal C through CKT 1221 (WHT/BLK) to the door lock cylinder switch terminal A w/o RKE or terminal C w/RKE. When closed the door lock cylinder switch supplies voltage from terminal B w/o RKE or terminal A w/RKE through CKT 56 (BLK/WHT) to the body relay block terminal D11.

The body relay block terminal D11. Terminal D11 and terminal D12 are internally bussed. B+ is available at the body relay block terminal D12 to operate the liftgate/endgate window release actuator.

The operation of the lift window release with the RKE is similar. Refer to Keyless Entry System Circuit Description in Keyless Entry.

The endgate/liftgate window release actuator is protected by a built-in electronic circuit breaker (ECB). If the motor is overloaded or voltage is applied for an excessive amount of time, the ECB internal resistance increases. This condition creates an open circuit. The resistance returns to normal after the voltage is removed from the circuit. This condition restores circuit continuity.

The tail gate alarm circuit contains the following components.

When the vehicle is started the instrument cluster runs a bulb check on the indicator lights for 3 seconds and then they all turn off. For more information refer to Indicator Description in instrument panel, gauges and console.

The Rear window cutout and liftglass ajar jamb switch is located on the liftgate or endgate directly under the liftglass. It is connected from terminal A through CKT 1303 to terminal B10 of connector C2 of the BCM. It receives its ground through terminal B through CKT 1350 to G450. When the ignition is turned on and the liftglass is opened a ground is applied through the closed contacts of the switch. A ground present at the BCM connector C2 terminal B10 is interpreted by the module as a request signal from the Rear window cutout and liftglass ajar jamb switch to turn the tail gate alarm indicator on. The BCM then sends a class 2 signal to the instrument cluster to turn on the tail gate alarm indicator.

The liftgate ajar jamb switch is located on the bottom of the liftgate near the latch. It is connected from terminal B through CKT 1303 to S900 of CKT 1303. It receives its ground through terminal D through CKT 1350 to G450. When the ignition is turned on and the liftgate is opened a ground is applied through the closed contacts of the switch. A ground present at the BCM connector C2 terminal B10 is interpreted by the module as a request signal from the liftgate ajar jamb switch to turn the tail gate alarm indicator on. The BCM then sends a class 2 signal to the instrument cluster to turn on the tail gate alarm indicator.