Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Left Multi-Function Switch: Description
The left (lighting) multi-function switch is secured to the right side of the multi-function switch mounting housing at the top of the steering column, just below the steering wheel (Fig 1). The only visible component of the left multi-function switch is the control stalk that extends through a dedicated opening in the right side of the steering column shrouds. The remainder of the left multi-function switch is concealed beneath the steering column shrouds. The switch is secured to the multi-function switch mounting housing near the top of the steering column by two screws.
The control stalk has a control knob on its end with a knurled face to allow it to be easily rotated. Just below the control knob is a knurled control sleeve. The left multi-function switch is the primary control for the interior and exterior lighting systems, and contains switches and circuitry to provide signals to the Body Control Module (BCM).
The left (lighting) multi-function switch cannot be adjusted or repaired. If any function of the switch is faulty, or if the switch is damaged, the entire switch unit must be replaced.
A single connector with eleven terminal pins is located on the back of the switch housing and connects the switch to the vehicle electrical system. The left multi-function switch supports the following exterior lighting functions:
- Auto Headlamps
- Front Fog Lamps
- Headlamps
- Headlamp Beam Selection
- Headlamp Optical Horn
- Park Lamps
- Turn Signal Control
The left multi-function switch also supports the following interior lighting functions:
- Panel Lamps Dimming
- Interior Lamps Defeat
- Interior Lamps On
- Parade Mode
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.