Trunk/Liftgate Actuator

Replace the trunk/liftgate actuator on a 1992 Dodge Viper, including removal of trunk trim, disconnection of the actuator electrical connector and mechanical linkage, and installation of the new actuator.

Warnings

Tools required

Parts

• Trunk latch actuator assembly × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Open trunk fully and prop open if necessary to maintain access
3. Disconnect negative battery terminal to disable power latch system during service
4. Allow vehicle to sit for 2 minutes after battery disconnect to dissipate residual electrical charge
5. Gather all tools and parts within reach of the trunk area
6. Inspect existing actuator operation and note failure mode (no operation, intermittent function, mechanical binding) to confirm diagnosis

Procedure

1. 1

   Remove trunk side trim panel
   Locate the trunk side trim panel on the driver side of the trunk compartment where the latch mechanism is mounted. Identify the retaining clips or fasteners securing the trim panel. The 1992 Viper trunk trim is typically retained by push-type clips along the perimeter. Use panel trim removal tools to carefully release each clip, working from one edge progressively around the panel. Support the panel as you release the final clips to prevent it from falling. Set the trim panel aside in a protected area to avoid scratches.
2. 2

   Access actuator mounting area
   With the trim panel removed, locate the trunk latch actuator assembly mounted to the trunk latch striker area on the body. The actuator is a small motor/solenoid unit connected to the latch mechanism via a mechanical linkage rod or cable. Use a flashlight to inspect the mounting configuration, electrical connector routing, and mechanical linkage attachment points. Note the orientation of the actuator and linkage for correct reinstallation.
3. 3

   Disconnect actuator electrical connector
   Locate the electrical connector attached to the trunk latch actuator. The connector typically has a locking tab or clip that must be depressed or lifted before the connector can be separated. Press the release tab and pull the connector straight off the actuator terminals. Inspect the connector terminals for corrosion or damage. If corrosion is present, clean with electrical contact cleaner and allow to dry before proceeding.
4. 4

   Disconnect mechanical linkage
   Identify the mechanical linkage (rod or cable) connecting the actuator to the trunk latch mechanism. This linkage typically attaches via a clip, pin, or snap connection on the actuator arm. The latch mechanism will be under spring tension, so control the linkage manually as you disconnect it. Remove the retaining clip or pin securing the linkage to the actuator arm, then carefully separate the linkage from the actuator. The latch may spring into the closed position; this is normal. Keep track of any small retaining clips or pins for reuse.
5. 5

   Remove actuator mounting fasteners
   Locate the 2 bolts securing the trunk latch actuator to its mounting bracket on the body. These are typically 8mm or 10mm hex head bolts. Use the appropriate socket and ratchet to remove both mounting bolts completely. Support the actuator with one hand as you remove the final bolt to prevent it from falling. Remove the actuator from the mounting bracket and set aside.
6. 6

   Inspect mounting bracket and latch mechanism
   With the actuator removed, inspect the mounting bracket for cracks, corrosion, or damage. Check the mechanical latch mechanism for smooth operation by manually moving it through its full range of motion. The latch should spring closed and release smoothly without binding. If the latch mechanism itself is damaged or binding, it may require separate service. Verify the mounting surface is clean and free of debris that could prevent proper seating of the new actuator.
7. 7

   Position new actuator
   Remove the new trunk latch actuator from its packaging and compare it to the old unit to verify correct replacement part. Position the new actuator onto the mounting bracket, aligning the mounting holes with the threaded bosses or nuts on the bracket. Ensure the actuator arm is oriented correctly to engage the mechanical linkage (reference the orientation noted during disassembly). Insert both mounting bolts and thread them in by hand to prevent cross-threading.
8. 8

   Tighten actuator mounting bolts
   Using a torque wrench and appropriate socket, tighten the actuator mounting bolts to 8.0 Nm (6 lb-ft). Tighten the bolts in an alternating pattern to ensure even seating of the actuator against the mounting bracket. Do not overtighten, as this can crack the actuator housing or distort the mounting bracket.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
9. 9

   Reconnect mechanical linkage
   Manually position the trunk latch mechanism into the position where the mechanical linkage can be reconnected to the actuator arm. Align the linkage rod or cable end with the connection point on the actuator arm. Install the retaining clip or pin to secure the linkage to the actuator arm. Ensure the connection is fully seated and the retaining hardware is properly installed. Gently tug on the linkage to verify it is securely attached and will not separate during operation.
10. 10

    Reconnect electrical connector
    Align the electrical connector with the terminals on the new trunk latch actuator. Push the connector onto the actuator terminals until it seats fully and the locking tab clicks into place. Gently pull on the connector body (not the wires) to verify it is securely locked. Inspect the wire routing to ensure it will not be pinched or interfere with any moving parts when the trunk is opened and closed.
11. 11

    Reinstall trunk trim panel
    Position the trunk side trim panel back into its mounting location. Align all mounting clips with their corresponding holes in the body. Starting from one edge, press firmly on each clip location to seat the clips fully. Work progressively around the panel perimeter, ensuring each clip engages completely. The panel should sit flush against the body with no gaps or loose areas.
12. 12

    Reconnect battery and perform functional test
    Reconnect the negative battery terminal and tighten the terminal bolt to 7.0 Nm (5 lb-ft). Do not overtighten. With the trunk open, use the interior trunk release mechanism to activate the trunk latch. Listen and feel for actuator operation; you should hear the motor run and feel the latch mechanism move. Close the trunk manually and verify it latches securely. Use the power release to unlatch the trunk and verify the trunk pops open as designed. Repeat this test 3-5 times to confirm consistent operation.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Trunk trim panel must be fully seated with all retaining clips engaged to prevent rattles and ensure proper appearance
2. Verify wire routing does not create pinch points or interference with trunk operation
3. Confirm mechanical linkage connection is secure and will not separate during repeated latch cycling

Verification

• With trunk closed, verify the latch holds securely and trunk cannot be opened by pulling up on the trunk lid
• Use the power release (key fob or interior button) to unlatch trunk; verify actuator operates and trunk releases properly
• Test manual emergency release mechanism (typically located inside trunk) to ensure it still functions correctly
• Cycle the trunk open and closed 5-10 times, testing power release each time to confirm consistent actuator operation
• Verify no unusual noises, binding, or hesitation during actuator operation
• Check that trunk warning light (if equipped) on instrument cluster operates correctly when trunk is open and extinguishes when closed

Related trouble codes on this vehicle

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