how to fix the rear window not working on Cadillac Escalade T1XX (2021-Present)

Symptoms

• Rear window does not respond to switch inputs
• No sound or movement when the switch is activated
• Other windows operate normally
• Rear window defrost may not engage
• Check for any blown fuses related to the window system

Diagnostic Steps

1. Inspect the window switch for damage or wear.
2. Check the fuse box for blown fuses related to the rear window operation.
3. Use an OBD-II scanner to check for any relevant diagnostic trouble codes (DTCs).
4. Test the rear window motor for electrical continuity using a multimeter.
5. Inspect the wiring harness for any visible damage or loose connections.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and turned off.
• Disconnect the negative battery terminal to avoid any electrical shorts.

2. Remove the Door Panel

• Tools Required: Socket set, trim removal tool.
• Carefully pry off any trim pieces surrounding the door panel.
• Remove screws securing the door panel (typically located around the edges and behind the handle).
• Gently lift the door panel upwards to disengage it from the clips.

3. Inspect and Test Components

• Locate the rear window motor and wiring harness.
• Tools Required: Multimeter.
• Use the multimeter to check for voltage at the window motor connector when the switch is activated.
  • If voltage is present but the motor does not work, replace the motor.
  • If no voltage is present, trace the wiring back to the switch.

4. Replace the Window Motor (if necessary)

• Disconnect the motor connector.
• Remove the motor by unscrewing any securing bolts.
• Install the new motor, ensuring it is properly aligned.
• Reconnect the motor connector.

5. Reassemble the Door Panel

• Reattach the door panel by aligning it with the clips and pushing down.
• Replace screws and any trim pieces removed during disassembly.
• Reconnect the negative battery terminal.