Jeep Cherokee 2000 Service Manual - page 429
OPERATION
With the hazard warning switch in the On posi-
tion, the hazard warning system is activated. When
the hazard warning system is activated, the circuitry
of the hazard warning switch and the combination
flasher will cause both the right side and the left side
turn signal indicator lamps, front park/turn signal
lamps, front side marker lamps and rear tail/stop/
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 front side marker
lamps will flash alternately.
See the owner’s manual in the vehicle glove box for
more information on the features, use and operation
of the hazard warning system.
TURN SIGNAL SWITCH AND HAZARD
WARNING SWITCH
DESCRIPTION
The turn signal and hazard warning switches are
integral to the multi-function switch unit, which is
secured to the left side of the steering column (Fig.
1). The only visible parts of the multi-function switch
are the control stalk that extends from the left side
of the steering column, and the hazard warning
switch button that protrudes from the top of the
steering column. The multi-function switch control
stalk has international control symbols on it, which
identify its functions. The hazard warning switch
button is identified with a double triangle, which is
the international control symbol for hazard warning.
The remainder of the multi-function switch is con-
cealed beneath the steering column shrouds.
The multi-function switch also contains circuitry
for the following functions:
•
Headlamp beam selection
•
Headlamp optical horn
The information contained in this group addresses
only the multi-function switch turn signal and haz-
ard warning functions. For information relative to
the other systems that are controlled by and circuits
that are integral to the multi-function switch, see the
group in this service manual that covers that system.
However,
the
turn
signal
and
hazard
warning
switches cannot be repaired. If these switches or any
other circuit or component of the multi-function
switch unit is faulty or damaged, the entire multi-
function switch unit must be replaced.
OPERATION
TURN SIGNAL SWITCH
The
multi-function
switch
control
stalk
that
extends from the left side of the steering column just
below the steering wheel is moved up or down to
activate the turn signal switch. When the control
stalk is moved in the upward direction, the right
turn signal switch circuitry is activated; and, when
the control stalk is moved in the downward direction,
the left turn signal switch circuitry is activated. The
turn signal switch has a detent position in each
direction that provides turn signals with automatic
cancellation, and an intermediate momentary posi-
tion in each direction that provides turn signals only
until the multi-function switch control stalk is
released.
When the turn signal switch is in a detent posi-
tion, it is turned off by one of two turn signal cancel-
ling cam lobes that are integral to the rotor of the
clockspring mechanism. Turning the steering wheel
causes the turn signal cancelling cam lobes to contact
a cancel actuator in the multi-function switch, and
the turn signal switch automatically returns to the
off position.
HAZARD WARNING SWITCH
The hazard warning switch is controlled by the
hazard warning switch button. Slide the switch but-
ton to the left to turn the switch on and activate the
hazard warning system, and slide the button to the
right again to turn the switch and the hazard warn-
ing system off.
Fig. 1 Multi-Function Switch
1 – HAZARD WARNING BUTTON
2 – CANCEL ACTUATOR
3 – CONTROL STALK
8J - 2
TURN SIGNAL AND HAZARD WARNING SYSTEMS
XJ
DESCRIPTION AND OPERATION (Continued)