Grand Cherokee 2WD V6-3.7L (2008)
Headlamp Alignment Switch: Description and Operation
Operation
OPERATION
The headlamp leveling switch receives battery voltage on a fused park lamp relay output circuit whenever the park lamp relay is energized (the park
lamps are turned ON). The switch receives a path to ground at all times through the instrument panel wire harness. 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 as well as the hard wired inputs and outputs of the switch may be diagnosed using conventional diagnostic tools and
procedures. Refer to the appropriate wiring information.
