signal switch has a detent position in each direction
that provides turn signals with automatic cancellation,
and an intermediate, momentary position in each direc-
tion that provides turn signals only until the left multi-
function switch control stalk is released. When the
control stalk is moved to a turn signal switch detent
position, the cancel actuator extends toward the center
of the steering column. A turn signal cancel cam that is
integral to the clock spring mechanism rotates with the
steering wheel and the cam lobes contact the cancel
actuator when it is extended from the multi-function
switch. When the steering wheel is rotated during a
turning maneuver, one of the two turn signal cancel
cam lobes will contact the turn signal cancel actuator.
The cancel actuator latches against the cancel cam rota-
tion in the direction opposite that which is signaled. In
other words, if the left turn signal detent is selected,
the lobes of the cancel cam will ratchet past the cancel
actuator when the steering wheel is rotated to the left,
but will unlatch the cancel actuator as the steering
wheel rotates to the right and returns to center, which
will cancel the turn signal event and release the control
stalk from the detent so it returns to the neutral OFF
position. If only momentary signaling such as indication
of a lane change is desired, the switch is actuated to a
left or right intermediate detent position. In this posi-
tion the signal lamps flash as described above, but the
switch returns to the OFF position as soon as the lever
is released. When the system is activated, one of two
indicator lamps mounted in the instrument cluster
flashes in unison with the turn signal lamps, indicating
to the driver that the system is operating.
If only momentary signaling such as indication of a
lane change is desired, the switch is actuated to a
left or right intermediate detent position. In this
position the signal lamps flash as described above,
but the switch returns to the OFF position as soon as
the lever is released.
When the system is activated, one of two indicator
lamps mounted in the instrument cluster flashes in
unison with the turn signal lamps, indicating to the
driver that the system is operating.
WIPERS
The multi-function switch uses conventionally
switched outputs and a variable resistor to control
the many functions and features it provides using
hard wired circuitry. The switch uses body ground
(Z1) when the ignition switch is in the Accessory or
ON position, battery current from a fuse in the
Power Distribution Center (PDC) is provided through
a BCM controlled ignition switch output (RUN/ACC)
circuit.
• Continuous Wipe Modes - When the control
knob is in the OFF position, the wiper system com-
pletes the cycle and the blades park in the lowest
portion of the wipe pattern When the control knob of
the windshield wiper/washer control stalk on the
right side of the multi-function switch is rotated to
the High or Low positions, the circuitry within the
switch provides a battery current output directly to
the high or low speed brush of the wiper motor.
When the control knob is in the OFF position, the
wiper system completes the cycle and the blades park
in the lowest portion of the wipe pattern.
• Intermittent Wipe Mode - When the wind-
shield wiper/washer control switch control is rotated
to the Delay position, the circuitry within the switch
connects the output of the wiper motor relay to the
low speed brush of the wiper motor and provides bat-
tery current.
• Washer Mode - Pulling windshield wiper/
washer control towards the steering wheel provides a
battery current output through the momentary single
pole, single throw washer switch circuitry to operate
the washer pump/motor.
HAZARD WARNING SYSTEM
The hazard warning switch is pushed down to
unlatch the switch and activate (turn ON) the hazard
warning system, and pushed down again to latch the
switch and turn the system OFF. When the hazard
warning switch is latched (hazard warning OFF), the
push button will be in a lowered position on the top
of the steering column shroud; and, when the hazard
warning switch is unlatched (hazard warning ON),
the push button will be in a raised position. The
multi-function switch hazard warning circuitry
simultaneously provides a signal to the hazard warn-
ing sense of the combination flasher to activate or
deactivate the flasher output, and directs the output
of the flasher to the hazard warning lamps. When
the hazard warning system is activated, the combina-
tion flasher will cause both the right and left side
turn signal indicator lamps, front park/turn signal
lamps, front side marker lamps and rear turn signal
lamps to flash ON and OFF. If the exterior lamps are
turned OFF, the front park/turn signal lamps and the
front side marker lamps will flash in unison. If the
exterior lamps are turned ON, the front park/turn
signal lamps and the side marker lamps will flash
alternately.
DIAGNOSIS AND TESTING - MULTI-FUNCTION
SWITCH
FLASHER DIAGNOSIS
Should any function of the multi-function switch
fail, the entire switch assembly must be replaced.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/MULTI-FUNCTION SWITCH -
REMOVAL).
ZB LAMPS 8L - 17
MULTI-FUNCTION SWITCH (Continued)
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