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.
Interior Lighting - Overview
The interior lighting system consists of:
- Courtesy lamps
- Demand lamps
- Ambient lighting
The courtesy lamps subsystem consists of:
- Interior lamps
- Puddle lamps
- Door ajar switches (integrated into the door latches)
- Courtesy lamp switch (integrated into the front interior lamp)
- Cargo lamps
- Truck bed lamps
- Trailer assist lamp
- DDM
- PDM
- BCM
The courtesy lamps provide illumination to the vehicle interior and below the exterior mirrors when entering or exiting the vehicle or when requested using the courtesy lamp switch located on the front interior lamp assembly.
The demand lamps subsystem consists of:
- Interior lamps (map lamps)
- Vanity mirror lamps
- Glove box lamp
- Cargo lamps
- Truck bed lamps
- Trailer assist lamp
- Cargo lamp switch (integrated into the headlamp switch)
- Floor console front and rear bins
- BCM
The demand lamps provide illumination to specific areas within the vehicle when needed.
The BCM energizes the demand lamp relay to supply voltage to the demand lamps when the battery saver feature is not active.
The ambient lighting subsystem consists of:
- Ambient lighting Light Emitting Diodes (LEDs)
- BCM
The ambient lighting provides illumination to the following locations for illuminated entry or when the ignition is in RUN with the parking lamps on:
- Floor console cup holders
- Interior door release handles
- Front footwells
- Rear footwells (under front seats)
- RH instrument panel
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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.