Dimmer Switch

Replace the dimmer switch (headlight dimmer/multifunction switch) located on the steering column of the 2017 Maserati Levante 3.0L V6 Twin Turbo.

Warnings

Tools required

Parts

• Dimmer switch assembly (multifunction switch) × 1 — Use OEM specification
• Steering column cover clips (if damaged) × 4 — Use OEM specification

Preparation

1. Park vehicle on level surface and apply parking brake
2. Turn ignition off and remove key fob from vehicle
3. Adjust steering wheel to lowest and fully extended position for maximum access
4. Place protective cloth over driver's seat to catch falling fasteners
5. Ensure steering wheel is centered and mark position with tape on wheel and column

Procedure

1. 1

   Disconnect battery
   Open hood and disconnect negative battery terminal. Use 10mm socket to loosen terminal bolt. Wait minimum 15 minutes to allow airbag system capacitors to fully discharge before proceeding with any work.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Remove lower steering column covers
   Locate the lower steering column cover beneath the steering wheel. Remove the Torx screws (typically T20) securing the lower cover. There are usually 2-3 screws at the bottom. Gently pull the lower cover away from the column, releasing any retention clips. Set aside carefully to avoid breaking clips.
   Torque spec

   Cover Screws11 Nm (8 lb-ft)
3. 3

   Remove upper steering column cover
   With lower cover removed, locate and remove the Torx screws securing the upper steering column cover (typically T20 or T25). The upper cover usually has 2 screws accessible from below. Carefully separate the upper cover from the column, being mindful of the ignition lock cylinder area. Set cover aside.
   Torque spec

   Cover Screws11 Nm (8 lb-ft)
4. 4

   Locate dimmer switch assembly
   With covers removed, identify the dimmer switch (multifunction switch) on the left side of the steering column. This is the stalk controlling headlights, high beam/low beam, turn signals, and possibly wipers. Note the routing of the electrical connector and any retention brackets.
5. 5

   Disconnect electrical connector
   Locate the electrical connector at the base of the dimmer switch assembly. Press the connector release tab (typically on top or side) and carefully pull the connector straight out from the switch. Do not pull on wires. If connector has a secondary lock, remove it first using a small flathead screwdriver.
6. 6

   Remove dimmer switch mounting fasteners
   Locate the mounting screws or bolts securing the dimmer switch assembly to the steering column. These are typically 2-3 Torx screws (T25 or T30) or small bolts accessible from the side or bottom of the switch housing. Remove all fasteners completely and retain for reinstallation.
   ⚠Support the switch assembly while removing final fastener to prevent it from falling and damaging wiring or clockspring.
   Torque spec

   Connector Screws4 Nm (3 lb-ft)
7. 7

   Remove dimmer switch assembly
   With fasteners removed, carefully slide the dimmer switch assembly away from the steering column. It may require a slight wiggle or rotation to clear any alignment pins or tabs. Remove the switch completely and inspect the mounting area for any damage or debris.
8. 8

   Install new dimmer switch
   Position the new dimmer switch assembly onto the steering column, aligning any locating pins or tabs with their corresponding holes. Ensure the switch is seated fully against the column mounting surface before installing fasteners. Verify switch operates smoothly through all positions before tightening.
9. 9

   Install and torque mounting fasteners
   Install the dimmer switch mounting screws or bolts and hand-tighten. Using a torque wrench, tighten fasteners to specification in a cross-pattern if multiple fasteners are present. Verify switch remains properly aligned and operates smoothly after torquing.
   Torque spec

   Connector Screws4 Nm (3 lb-ft)
10. 10

    Reconnect electrical connector
    Align the electrical connector with the dimmer switch terminal and push firmly until the connector locks into place with an audible click. Install any secondary connector lock if equipped. Gently tug on connector to verify secure connection.
11. 11

    Reinstall steering column covers
    Position the upper steering column cover onto the column, ensuring proper fit around the ignition cylinder and switch assemblies. Install and hand-tighten cover screws. Position the lower cover, aligning all clips and mounting points. Install lower cover screws. Torque all cover screws to specification.
    Torque spec

    Cover Screws11 Nm (8 lb-ft)
12. 12

    Reconnect battery
    Return to the engine compartment and reconnect the negative battery terminal. Torque the battery terminal bolt to specification. Do not overtighten as this can damage the battery terminal.
    ℹ️After reconnecting battery, vehicle may require initialization procedures for power windows and other systems.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all steering column covers are properly seated with no gaps
2. Verify all screws and fasteners are installed and torqued to specification
3. Check that dimmer switch stalk operates smoothly through all positions without binding
4. Confirm steering wheel remains centered and aligned with previous marking

Verification

• Turn ignition to ON position (engine off) and verify instrument cluster illuminates without warning lights related to lighting system
• Test dimmer switch through all functions: parking lights, low beams, high beams, flash-to-pass, and turn signals in both directions
• Verify automatic headlight function operates correctly if equipped
• Check that all lighting modes function properly with exterior lights
• Use diagnostic scanner to check for any stored fault codes related to lighting or steering angle sensor
• Test drive vehicle briefly to ensure turn signal auto-cancel functions correctly
• Verify steering angle sensor does not show faults (recalibration may be required at dealer)

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