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

1. The underhood fuse block
2. MIR/LKS fuse connector C1, terminal A5
3. CKT 840 (ORN)

When the correct control inputs are received, the underhood fuse block provides B+ at connector C1, terminal B6 through CKT 56 (BLK/WHT) to the endgate window release actuator terminal A. The endgate window release actuator is provided a ground continuously from terminal B through CKT 1350 (BLK) to G450.

The underhood fuse block also provides B+ to the endgate lock cylinder switch in order to allow for a remote or non-remote operation.

For the remote method, a 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 endgate 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 receiver provides the signal. Refer to Remote Keyless Entry.

If all the required input conditions for correct operation exist, the BCM allows remote operation of the endgate window release from either a switch inside the vehicle, a switch on the endgate, 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 lock cylinder switch.

An endgate window release switch (REAR HATCH) is located on the console. The REAR HATCH switch is part of the rear wiper/washer and endgate window release switch. The REAR HATCH switch is a manually controlled momentary contact switch. The switch is normally open.

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

The endgate window release (REAR HATCH) switch is provided a ground continuously from terminal E through CKT 1850 (BLK) to G200. Another ground redundant to the endgate window release (REAR HATCH) switch circuit is provided from G200 through CKT 1850 (BLK) to G201.

When the endgate window release (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 endgate window release (REAR HATCH) switch.

Upon receiving a request signal from the endgate window release (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 underhood fuse block connector C1, terminal A5 through the following components during non-remote operation of the system:

1. A separate control circuit that includes the following components:

1.1.	The underhood fuse block connector C1, terminal A5

1.2.	An endgate lock cylinder switch

1.3.	A door lock cylinder switch, which is part of the right front door actuator

2. Related circuits
3. The body relay block terminal D11

The endgate lock cylinder switch is located in the endgate. The endgate lock cylinder switch is manually controlled. The endgate lock cylinder switch is a momentary contact switch that is normally open. The RH door lock cylinder switch is part of the right front door lock actuator. The door lock cylinder switch is closed when the right front door is unlocked. The switch is open when the door is locked.

The underhood fuse block supplies B+ continuously from connector C1, terminal A5 through CKT 840 (ORN) to the endgate lock cylinder switch terminal D. When the switch is closed, the endgate lock cylinder switch supplies voltage from terminal C through CKT 1221 (WHT/BLK) to the door lock cylinder switch terminal B. When closed the door lock cylinder switch supplies voltage from terminal D through CKT 56 (BLK/WHT) to the body relay block terminal  D11 and then to the endgate window release actuator terminal A.

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 wiper 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.