Power Window Motor - Front

This procedure covers the removal and replacement of the front power window motor on a 2008 Dodge Viper, requiring removal of the door trim panel and access to the window regulator assembly.

Warnings

Tools required

Parts

• Front power window motor × 1 — Use OEM specification or Mopar equivalent

Preparation

1. Park vehicle on level surface and turn off ignition
2. Disconnect negative battery terminal and wait 2 minutes
3. Roll window to approximately mid-travel position for easier access to motor mounting bolts
4. Protect door sill and exterior paint with towels or painter's tape if needed

Procedure

1. 1

   Remove door pull handle trim
   Insert a trim tool behind the door pull handle trim piece at the rear edge. Carefully pry the trim piece away from the door panel to release the retaining clips. Pull the trim piece forward and away from the door. This exposes the fasteners behind the door pull.
2. 2

   Remove door panel fasteners
   Remove the T25 Torx screws securing the door panel. There is typically one screw behind the door pull handle, one in the door pull cup, and additional screws along the bottom edge of the door panel. Check the perimeter and armrest area for all fasteners before attempting to remove the panel.
3. 3

   Disconnect door latch release cable and remove door panel
   Lift the door panel upward approximately 1 inch to disengage it from the upper door frame lip. While holding the panel away from the door, reach behind and disconnect the door latch release cable by unhooking it from the latch mechanism. Disconnect any electrical connectors for power windows, locks, and mirrors by pressing the release tabs. Remove the door panel from the vehicle.
4. 4

   Remove vapor barrier access
   Carefully peel back the plastic vapor barrier sheet in the area of the window regulator and motor. The barrier is typically adhered with butyl sealant. Peel back only enough to access the motor mounting bolts and electrical connector - you may cut a careful access flap if needed to preserve the barrier for reinstallation.
5. 5

   Support window glass
   Use masking tape to secure the window glass to the door frame in its current position, or have an assistant hold the glass. This prevents the window from dropping when the regulator is disconnected. Alternatively, raise the window fully and tape it to the door frame at the top.
6. 6

   Disconnect window motor electrical connector
   Locate the electrical connector on the window motor. Press the release tab and disconnect the connector from the motor. Move the wiring harness aside to provide clearance for motor removal.
7. 7

   Remove window motor mounting fasteners
   Remove the three T30 Torx bolts securing the window motor to the regulator assembly. The motor is typically mounted to the regulator mechanism on the lower portion of the door. Support the motor as you remove the final bolt to prevent it from falling.
8. 8

   Separate motor from regulator
   Carefully separate the window motor from the regulator drive mechanism. On most Viper models, the motor has a gear or shaft that engages with the regulator mechanism. Rotate the motor slightly if needed to disengage the drive mechanism, then remove the motor through the access hole in the door frame.
9. 9

   Install new window motor
   Position the new window motor into the door frame and align it with the regulator mechanism. Ensure the motor drive gear properly engages with the regulator mechanism before seating the motor fully against the mounting surface. Install the window motor mounting bolts and tighten to the manufacturer-specified torque (typically approximately 7 ft-lbs / 9 Nm for M6-class fasteners — verify against Viper service data to avoid stripping the regulator). Verify the motor is firmly seated and the drive mechanism is properly engaged.
10. 10

    Reconnect electrical and test operation
    Reconnect the electrical connector to the new window motor, ensuring it clicks into place. Temporarily reconnect the battery negative terminal. Turn the ignition to the ON position and test window operation through full up and down travel to verify proper motor function and that the window moves smoothly without binding. Disconnect the battery again before proceeding.
11. 11

    Reinstall vapor barrier
    Press the vapor barrier sheet back into position, ensuring it adheres properly to the door frame. If the butyl sealant has lost adhesion, apply new butyl tape or automotive weatherstrip adhesive to ensure a proper moisture seal. Smooth out any wrinkles or air pockets.
12. 12

    Reinstall door panel
    Reconnect all electrical connectors for power windows, locks, and mirrors. Reconnect the door latch release cable to the latch mechanism. Position the door panel and engage it onto the upper door frame lip, then press the panel firmly against the door frame to engage all retaining clips. Install all T25 Torx screws in their original locations and tighten securely. Reinstall the door pull handle trim piece by pressing it firmly into place until the clips engage.

Reassembly

1. Reconnect battery negative terminal
2. Perform window auto-up/auto-down relearn procedure if equipped: roll window fully down, hold switch down for 2 seconds, roll window fully up, hold switch up for 2 seconds
3. Verify all door panel clips are fully engaged and the panel is secure
4. Test all door functions including locks, mirrors, and window operation through full travel

Verification

• Operate window through complete up and down cycles multiple times to verify smooth operation
• Listen for any unusual noises from the motor or regulator during operation
• Verify window seals properly against weatherstripping when fully closed
• Check that door panel is secure with no rattles or loose clips
• Verify all door electrical functions operate correctly

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

Chasing one of these codes and not sure which part is guilty? Ask a master mechanic about YOUR car →

More procedures for this vehicle