Liberty Sport 4WD L4-2.4L VIN 1 (2002)
Headlamp Switch: Description and Operation
Fig.34 Headlamp Leveling Switch
HEADLAMP LEVELING SWITCH
The headlamp leveling switch (Fig. 34) is used only on vehicles manufactured for certain markets where the headlamp leveling system is required.
The headlamp leveling switch is mounted in the driver side inboard trim bezel on the instrument panel, where it is secured by molded latch
features that are integral to the switch housing. Only the switch bezel and thumbwheel are visible on the outer surface of the instrument panel trim
bezel. The black plastic switch thumbwheel is marked with white numbers "0," "1,""2," and "3," each of which indicates one of the four switch
detent positions. Each higher number represents a lower aiming position of the headlamp beam relative to the road surface. The black, molded
plastic switch housing has an integral connector receptacle on the back, a single latch feature on the top, and two latch features (one on each side)
on the bottom. The switch is connected to the vehicle electrical system through a dedicated take out and connector of the instrument panel wire
harness. Within the switch housing is the leveling switch circuitry including the switch contacts and a series resistor configuration.
The headlamp leveling switch cannot be adjusted or repaired and, if faulty or damaged, the unit must be replaced.
The headlamp leveling switch receives battery current on a fused park lamp relay output circuit from a fuse in the Junction Block (JB) whenever
the park lamp relay is energized (park lamps are turned ON). The switch receives a path to ground through a splice block located in the instrument
panel wire harness with an eyelet terminal connector that is secured by a nut to a ground stud on the driver side instrument panel end bracket near
the JB. The only output from the switch is a voltage signal that it provides to the headlamp leveling motors on a headlamp adjust signal circuit.
Each switch position selects a different tap on a series resistor within the switch to provide a different voltage signal to the leveling motors. The
higher the switch position number, the higher the output voltage level.
The headlamp leveling switch can be tested using conventional diagnostic tools and methods.
