RAM 2500 Truck 2WD L6-6.7L DSL Turbo (2010)
Headlamp Switch: Description and Operation
Headlamp Switch - Description
DESCRIPTION
The headlamp switch (1) is located on the instrument panel, in a mounting hole below the left instrument panel vent to the left of the steering column.
Two different switches are used. The standard switch features a four-position rotary knob (6) for exterior lighting control, a thumbwheel (4) for panel
lamps dimming and interior lighting control, and a momentary push button (5) for cargo lamp control. An optional switch has a momentary PUSH
function added to the rotary knob for front fog lamp control.
Each of these switches is constructed of molded plastic. The rotary knob is molded plastic and knurled around its circumference to ease operator control.
The thumbwheel is also plastic and knurled. On vehicles with optional fog lamps the rotary knob also has the text PUSH and an International Control
and Display Symbol icon for Front Fog Light applied to it. The cargo lamp push button is plastic with a smooth finish and the International Control and
Display Symbol icon for Work Light applied to it. The switch face plate is also labeled with graphics and icons to clearly identify the many functions of
the rotary knob and thumbwheel.
The switch housing is secured within the mounting hole of the left instrument panel vent bezel by four spring steel retention clips (2), two on each side.
The back of the switch housing has an integral connector receptacle (3) containing terminal pins that connect the switch to the vehicle electrical system
through a dedicated take out and connector of the instrument panel wire harness. Two panel dimmer controlled Light Emitting Diode (LED) units
soldered to the circuit board within the switch provide back lighting for visibility at night, but are not serviceable.
The headlamp switch cannot be repaired and, if ineffective or damaged, it must be replaced.
