Description
DESCRIPTION
The interior lighting system for this vehicle includes incandescent lighting on two separate circuits: the dome/courtesy lamp circuit and the panel lamps dimmer circuit. The lamps on the dome/courtesy circuit include:
- Cargo Lamps (4) - Optional 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 pick-up box.
- Front Dome/Reading Lamps (2) - The standard front dome/reading lamp includes two bulbs and two integral push button actuated switches. This lamp is located in the center of the headliner near the windshield header. In vehicles with an optional overhead console these lamps are replaced by two dome/reading lamps that are integral to the overhead console. The overhead console lamps have switches that are actuated by depressing the lamp lenses.
- Glove Box Lamp (1) - A glove box lamp with an integral plunger-actuated switch is standard equipment on quad cab vehicles. The lamp and switch are located at the upper right corner of the instrument panel glove box opening and illuminates whenever the glove box is opened.
- Rear Dome/Reading Lamps (3) - A standard rear dome lamp is located in the headliner at the back of the cab above the rear window. On club cab vehicles this lamp is activated by the door ajar switches or the interior lighting thumbwheel on the headlamp switch. On quad cab vehicles the standard rear dome lamp is replaced with a rear dome/reading lamp that includes a switch that is actuated by depressing the lamp lens.
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. Some have miniature incandescent bulbs or Light-Emitting Diode (LED) units that are soldered to internal circuit boards and are not serviceable. The replaceable incandescent bulbs or bulb/bulb holder units on the panel lamps dimmer circuits in this vehicle include:
- Center Bezel Lamp - An optional center bezel lamp with a replaceable bulb is located on the underside of the instrument panel center bezel below the heater/air conditioner control to illuminate an optional center console forward storage bin and cup holders.
- Compass Mini-Trip Computer Control Illumination Lamps - The optional Compass Mini-Trip Computer (CMTC) has three replaceable bulb/bulb holder units to illuminate its controls.
- Heater-Air Conditioner Control Illumination Lamps - The heater-air conditioner control panel has two replaceable bulb/bulb holder units to illuminate its controls.
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 vertical thumbwheel for selecting the panel lamps dimming level and for interior lighting control. A PARADE position of the thumbwheel illuminates all Vacuum Fluorescent Display (VFD) 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. 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. Description.
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.