RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo (2008)
Combination Switch: Description and Operation
Description
DESCRIPTION
The multi-function switch (3) is located on the steering column, just below the steering wheel. The only visible components of the multi-function switch
are the control stalk (2) and control knob (1) that extend through the steering column shrouds on the left side of the column, and the hazard warning push
button (4) that extends through the shroud on the top of the column. The remainder of the switch including its mounting provisions, its electrical
connection, and the turn signal cancel actuator (5) are concealed beneath the shrouds.
The switch housing and controls are constructed of molded black plastic. Each of the switch controls has white International Control and Display Symbol
graphics applied to it, which clearly identify its many functions. Three integral locating posts on the switch housing, one on the top and two on the
bottom, slide into channels in a receptacle on the left side of the multi-function switch mounting housing near the top of the steering column to ensure
proper positioning of the switch. Then two screws secure the switch to the mounting housing. A single integral connector receptacle containing four
terminal pins on the back of the switch housing connects the switch to the vehicle electrical system through a dedicated take out and connector of the
instrument panel wire harness.
The multi-function switch provides the vehicle operator with a control interface for the following functions:
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Hazard Warning Control - The multi-function switch hazard warning push button provides two detent positions (ON and OFF) to control the
hazard warning lamps.
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Headlamp Beam Selection - The multi-function switch control stalk provides detent switching for selection of the headlamp HIGH or LOW
beams. There is also an intermediate momentary position that allows the headlamp high beam circuits to be momentarily flashed to provide an
optical horn feature (sometimes referred to as flash-to-pass) as an optical signalling device.
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Turn Signal Control - The multi-function switch control stalk provides momentary non-detent (lane change) switching or detent switching with
automatic cancellation for both the left and right turn signal lamps.
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Washer Control - The multi-function switch control knob provides a momentary WASH position for washer system operation.
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Wiper Control - The multi-function switch control knob provides two continuous wipe switch positions, LOW speed or HIGH speed; and an
intermittent wipe mode with five delay interval positions.
The multi-function switch cannot be adjusted or repaired. If any function of the switch is ineffective, or if the switch is damaged, the entire switch must
be replaced as a unit.
