Dimmer Switch

Replace the headlight dimmer switch (multifunction switch) on the steering column of a 2008 Dodge Viper, requiring removal of steering column covers and clockspring assembly.

Warnings

Tools required

Parts

• Multifunction switch assembly (dimmer switch) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and set parking brake
2. Turn ignition to OFF position and remove key
3. Turn steering wheel to straight-ahead position
4. Disconnect battery negative terminal and wait minimum 2 minutes for airbag system discharge
5. Ensure front wheels remain pointed straight ahead throughout procedure

Procedure

1. 1

   Remove lower steering column cover
   Locate and remove the Torx fasteners securing the lower steering column cover. There are typically 2-3 fasteners accessible from underneath the column. Carefully pull the lower cover away from the column and set aside.
2. 2

   Remove upper steering column cover
   Remove the Torx fasteners securing the upper steering column cover (typically 2 fasteners). Separate the upper cover from the lower column shroud by releasing any retaining clips at the front and rear. Lift the upper cover off the column and set aside.
3. 3

   Disconnect multifunction switch harness connector
   Locate the multifunction switch electrical connector on the left side of the steering column. Press the connector lock tab and carefully pull the connector straight out from the switch assembly. Note the connector routing for reinstallation.
4. 4

   Remove clockspring retaining screws
   Identify the clockspring assembly surrounding the steering shaft behind the multifunction switch. Remove the 3 Torx screws securing the clockspring to the steering column. Do not allow the clockspring to rotate during removal.
5. 5

   Remove clockspring assembly
   Carefully slide the clockspring assembly forward off the steering shaft while supporting it to prevent rotation. The clockspring has an internal ribbon cable that can be damaged if rotated beyond its travel limits. Set the clockspring aside on a flat surface with the front facing up. If the clockspring has a locking pin or tape securing the rotor, leave it in place.
6. 6

   Remove multifunction switch mounting fasteners
   Locate the 2 Torx screws securing the multifunction switch assembly to the steering column bracket (typically T20 fasteners). Remove both screws completely and retain them for reinstallation.
7. 7

   Remove multifunction switch assembly
   Carefully pull the multifunction switch assembly away from the steering column. The switch lever assembly will slide out of its housing. Remove the switch completely from the vehicle.
8. 8

   Install new multifunction switch
   Position the new multifunction switch assembly onto the steering column mounting bracket, ensuring the lever housing aligns properly with the column. Install the 2 Torx mounting screws and tighten securely but do not overtighten. Consult the factory service manual for the exact torque specification before final tightening.
9. 9

   Reinstall clockspring assembly
   Verify the clockspring is centered (locking pin installed or centering window shows proper alignment). Carefully slide the clockspring onto the steering shaft, aligning the internal splines. Ensure the clockspring is fully seated against the column. Install the clockspring retaining screws and tighten to the factory-specified torque per the service manual.
10. 10

    Reconnect electrical connector
    Route the multifunction switch harness connector along its original path. Push the connector firmly into the switch body until the locking tab clicks into place. Verify the connection is secure by gently pulling on the connector.
11. 11

    Reinstall steering column covers
    Position the upper steering column cover over the column, ensuring all wiring is properly routed and not pinched. Align the cover with the lower column shroud and engage any retaining clips. Install the upper cover Torx fasteners. Position the lower steering column cover and install its fasteners. Verify all covers are secure and properly seated.
12. 12

    Reconnect battery and test operation
    Reconnect the battery negative terminal. Turn the ignition to ON position (engine off). Test all dimmer switch functions: high beam, low beam, and flash-to-pass. Verify turn signals operate correctly from the multifunction switch and hazard switch. Confirm horn and steering-wheel-mounted controls (if equipped) function to verify clockspring continuity. Check that no airbag warning lights remain illuminated after approximately 10 seconds.

Reassembly

1. Ensure all steering column covers are fully seated with no gaps
2. Verify no wiring is pinched between covers or interfering with steering column movement
3. Confirm clockspring locking pin (if equipped) was removed before final testing
4. Test all multifunction switch operations including wipers, turn signals, and dimmer functions

Verification

• Turn ignition to ON and verify no airbag warning light remains illuminated after initial self-check
• Operate dimmer switch through all positions: low beam, high beam, and flash-to-pass
• Test turn signals left and right to verify clockspring connection integrity
• Verify all other multifunction switch functions (wipers, washer) operate correctly
• Confirm steering wheel turns lock-to-lock without binding or unusual resistance
• Check that all steering column covers are secure and properly aligned

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