Raider 4WD V6-3.7L SOHC (2007)
the front fog lamp indicator.
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Exterior Lighting Control - The rotary knob on the headlamp switch is rotated to a detent position to activate or deactivate the exterior lighting.
The headlamp switch provides an output to the EMIC, and the EMIC responds by sending electronic exterior lighting switch status messages to the
FCM over the CAN data bus. The FCM responds by energizing or de-energizing the park lamp relay in the PDC and the high or low beam
headlamp circuits, and by sending an electronic message back to the EMIC to control the high beam indicator. The FCM also remembers which
headlamp beams were last selected using the multi-function switch, and energizes those beams by default the next time the headlamps are turned
ON. If the vehicle is equipped with optional automatic headlamps and the A (Automatic) position is selected, the EMIC also monitors an input
from a sun load sensor on the instrument panel and, based upon the monitored ambient light levels, responds by automatically sending appropriate
messages to the FCM to turn the exterior lighting ON or OFF while the ignition switch is in the ON position.
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Interior Lighting Control - The thumbwheel on the headlamp switch is rotated to the dome DEFEAT, dome ON, PARADE mode, or one of the
six panel dimmer detent positions to control the interior courtesy/dome and panel lamps. The headlamp switch provides an output to the EMIC,
and the EMIC responds by providing the appropriate interior lighting control outputs through its internal courtesy lamp driver circuits, electronic
dimming level messages to other modules over the CAN data bus, and the proper PWM outputs to control dimming levels through several panel
dimmer illumination control driver circuits.
The headlamp 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.
