Jeep Grand Cherokee Wj 2000 Manual - page 3
TURN SIGNAL SWITCH AND HAZARD
WARNING SWITCH
DESCRIPTION
The turn signal and hazard warning switches are
integral to the left (lighting) multi-function switch
unit, which is secured to the left side of the multi-
function switch mounting housing at the top of the
steering column (Fig. 1). The only visible parts of the
left multi-function switch are the control stalk that
extends from the left side of the steering column, and
the hazard warning switch push button that pro-
trudes from the top of the steering column. The left
multi-function switch control stalk has both nomen-
clature and international control symbols on it,
which identify its many functions. The hazard warn-
ing switch push button is identified with a double tri-
angle, which is the international control symbol for
hazard warning. The remainder of the left multi-
function switch is concealed beneath the steering col-
umn shrouds.
The left multi-function switch also contains cir-
cuitry for the following functions:
•
Exterior lighting control, including:
•
Fog lamps
•
Park lamps
•
Headlamps
•
Auto headlamps (if equipped)
•
Headlamp beam selection
•
Headlamp optical horn.
•
Interior lighting control, including:
•
Interior lamps defeat
•
Interior lamps on
•
Panel lamps dimming.
The information contained in this group addresses
only the left multi-function switch turn signal and
hazard warning functions. For information relative to
the other systems that are controlled by and circuits
that are integral to the left multi-function switch, see
the group in this service manual that covers that sys-
tem. However, the turn signal and hazard warning
switches cannot be repaired. If these switches or any
other circuit or component of the left multi-function
switch unit is faulty or damaged, the entire left
multi-function switch unit must be replaced.
OPERATION
TURN SIGNAL SWITCH
The left 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 left 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 lobes of the turn
signal cancelling cam, which is located beneath the
clockspring mechanism within the multi-function
switch mounting housing on the steering column.
Turning the steering wheel causes the turn signal
cancelling cam lobes to contact a cancel actuator in
the left 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 push button. Push the switch
button in to unlatch the switch and activate the haz-
ard warning system, and push in on the button again
to latch the switch and turn the system off. When
the hazard warning switch is latched (hazard warn-
ing 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 posi-
tion.
Fig. 1 Left (Lighting) Multi-Function Switch
1 – EXTERIOR LIGHTING CONTROL
2 – INTERIOR LIGHTING CONTROL
3 – CONTROL STALK
4 – HAZARD WARNING BUTTON
5 – CANCEL ACTUATOR
6 – LEFT (LIGHTING) MULTI-FUNCTION SWITCH
WJ
TURN SIGNAL AND HAZARD WARNING SYSTEMS
8J - 3
DESCRIPTION AND OPERATION (Continued)