Grand Cherokee 2WD V6-3.7L (2008)
Steering Mounted Controls Communication Module: Description and Operation
Description
DESCRIPTION
This vehicle is equipped with a Steering Control Module (SCM) that is internal to the left multi-function switch housing (2). The left (lighting)
multi-function switch is located on the left side of the steering column, just below the steering wheel. This switch is the primary control for the interior
and exterior lighting systems. The only visible components of the switch are the control stalk (1), control knob and control sleeve that extend through the
steering column shrouds on the left side of the column. The remainder of the switch including its mounting provisions and electrical connections are
concealed beneath the shrouds.
The switch housing and controls are constructed of molded black plastic. A single screw (7) through a mounting tab integral to the back of the switch
housing, and a slide tab integral to the bottom of the switch housing secure the switch to the mounting bracket integral to the clockspring (3). A
connector receptacle containing seven terminal pins is integral to the inboard end of the switch housing and connects the SCM through a jumper wire
harness (5) directly to the right (wiper) multi-function switch (6). A second connector receptacle containing four terminal pins is integral to the back of
the switch housing and connects the SCM to the vehicle electrical system through a dedicated takeout and connector of the instrument panel wire
harness.
The SCM cannot be adjusted or repaired. If ineffective or damaged the entire left multi-function switch must be replaced. See: Lighting and
Horns/Sensors and Switches - Lighting and Horns/Combination Switch/Service and Repair/Removal. The clockspring (with the multi-function switch
mounting bracket), the left multi-function switch (with the SCM), the right multi-function switch and the jumper wire harness are each available for
separate service replacement.
