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Interior Lighting - Description






DESCRIPTION





The interior lighting system for this vehicle includes incandescent lighting on several separate circuits. The lamps in the interior lighting system include:

- Cargo Lamps (7) - The standard equipment cargo lamps are integral to the Center High Mounted Stop Lamp (CHMSL) located on the roof rear header above the rear glass on the back of the cab. One cargo lamp bulb is behind a clear lens on each outboard side of the center red lens of the CHMSL. The cargo lamps are manually activated or deactivated by depressing the momentary cargo lamps push button of the headlamp switch on the instrument panel to illuminate the cargo area of the pickup box. The cargo lamps will also be activated for approximately 30 seconds when the Remote Keyless Entry (RKE) transmitter UNLOCK button is depressed, as part of the Illuminated Entry feature.
- Center Bezel Lamp (2) - An optional center bezel lamp with a replaceable bulb is located on the underside of an opening in the instrument panel center bezel to illuminate the center console forward storage bin and is supplied voltage by the park lamp circuit to illuminate whenever the exterior lighting is turned ON.
- Front Dome or Dome/Reading Lamp (Standard Cab Except With Overhead Console) (6) - On standard cab the dome lamp is centered front to rear in the headliner. The standard (base) dome lamp has a single bulb and is switched by the door ajar switches or the interior lighting thumbwheel of the headlamp switch. The optional dome/reading lamp is mounted in the same location but includes an integral switch that is actuated by depressing the lamp lens.
- Front Dome or Dome/Reading Lamp (Quad or Crew Cab Except With Overhead Console) (3) - On quad cab or crew cab the front dome lamp is centered front to rear in the headliner. The standard (base) dome lamp has a single bulb and is switched by the door ajar switches or the interior lighting thumbwheel of the headlamp switch. The optional dome/reading lamp is mounted in the same location but also includes an integral switch that is actuated by depressing the lamp lens.
- Front Dome/Reading Lamps (With Overhead Console) (5) - In vehicles equipped with an optional overhead console there are two dome/reading lamps that are integral to the overhead console, which is centered in the headliner near the windshield header. The overhead console lamps are switched by the door ajar switches or the interior lighting thumbwheel of the headlamp switch, but also have switches that are individually actuated by depressing their respective lamp lenses.
- Glove Box Lamp (1) - An optional glove box lamp with an integral switch is located at the upper left corner of the instrument panel upper glove box bin and illuminates whenever the upper glove box door is opened.
- Rear Dome or Dome/Reading Lamp (Quad or Crew Cab Only) (6) - The rear dome lamp on quad cab and crew cab includes a single bulb and is switched by the door ajar switches or the interior lighting thumbwheel of the headlamp switch. This lamp is centered in the headliner near the back of the cab. The optional dome/reading lamp is mounted in the same location but includes an integral switch that is actuated by depressing the lamp lens.
- Storage Bin Lamps (8) - In vehicles equipped with the optional Rambox storage bins there are two lamps located in each storage bin that are controlled by a plunger-type switch that is automatically activated to turn the lamps ON when the storage bin cover is opened, and turn them OFF again when the storage bin cover is closed. Each storage bin also has a push button switch at the rear of the bin that allows the lamps to be manually toggled ON and OFF while the storage bin cover is open.
- Vanity Lamps (4) - An optional single intensity vanity lamp is located on one side of a covered mirror on both the right and left sun visors, and is controlled by an integral vanity mirror cover-actuated switch.

Most controls on the instrument panel and elsewhere in the interior of the vehicle are illuminated by the panel lamps dimmer circuit for night visibility. All have miniature incandescent bulbs, Light-Emitting Diode (LED) units or a combination of the two lighting types that are soldered to internal circuit boards and are not serviceable.

Other components of the interior lighting system for this vehicle include:

- Door Ajar Switches - A door ajar switch is integral to the door latch mechanism of each front and rear door.
- Headlamp Switch - A headlamp switch is located on the left side of the instrument panel, below and outboard of the steering column. The headlamp switch includes a horizontal thumbwheel for selecting the panel lamps dimming level and for interior lighting control. A PARADE position of the thumbwheel illuminates all display units at full brightness for visibility when driving in daylight with the exterior lighting turned ON. There are also detent positions to turn ON all interior courtesy lighting, and a DEFEAT position that overrides door ajar switch control of interior lighting. Headlamp Switch - Description.
- Instrument Cluster - The ElectroMechanical Instrument Cluster (EMIC) is also known as the Cab Compartment Node (CCN) in this vehicle. The EMIC/CCN is located in the instrument panel above the steering column opening, directly in front of the driver. Instrument Cluster - Description.
- Totally Integrated Power Module - The Totally Integrated Power Module (TIPM) is located in the engine compartment, near the battery. Description and Operation.

Hard wired circuitry connects the interior lighting system components to the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the interior lighting components through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

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