Headlamp Switch: Description and Operation

HEADLAMP LEVELING SWITCH - EXPORT

Fig.30 Headlamp Leveling Switch - Export:

The Headlamp Leveling Switch is located next to the headlamp switch (Fig 30) and is the primary controller of the headlamp leveling system. The leveling switch has three settings 0-2, "0" being the lowest, "2" being the highest headlight beam vertical setting.

With the rotation of the headlamp leveling switch control knob, voltage is adjusted at the headlamp leveling switch (rheostat). This signals the headlamp leveling motors (headlamp module mounted) to adjust the vertical headlamp beam pattern accordingly. The headlamps must be "ON" in order for the leveling system to function. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

Fig.31 Headlamp Switch - Police:

HEADLAMP SWITCH - POLICE
This vehicle is equipped with a stealth mode. During periods of surveillance, the headlamp switch may be placed in the "A" position or Approach mode (Fig. 31). In this position, all exterior lighting (Daytime Running Lamps - if equipped) will be cancelled.

NOTE: On Canadian vehicles, the Daytime Running Lamps will not be disabled. These must stay operable due to Canadian federal regulations.

By pulling out on the switch (toward the driver) the lamps will be in Apprehend mode (Fig. 31). In this mode, all M2 circuit interior illumination, except for PRNDL, odometer, cluster back lighting, and vehicle critical warning indicators will be cancelled. The cluster back lighting, PRNDL, and odometer will go to a minimum dimming level.

The Body Control Module (BCM) must be flashed with a special police package for the stealth mode to work. A security provision may require the unique engine controller to broadcast a code to allow the BCM to be flashed with the police package program.

Approach Mode
To place the vehicle's lighting system into Approach mode, turn the switch counterclockwise to the A on the headlamp switch (Fig. 31).

Apprehend Mode
To place the vehicle's lighting system into Apprehend mode, turn the switch counterclockwise to the A on the headlamp switch and pull out (toward the driver) on the selector knob (Fig. 31).