Turn Signal And Hazard Warning Systems - Jeep 1997 Grand Cherokee Service Manual

ZG

TURN SIGNAL AND HAZARD WARNING SYSTEMS

GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
COMBINATION FLASHER
HAZARD WARNING SYSTEM
TURN SIGNAL INDICATOR LAMP . . . . . . . . . . . 2
TURN SIGNAL LAMP . . . . . . . . . . . . . . . . . . . . . 2
TURN SIGNAL SWITCH AND HAZARD
WARNING SWITCH
TURN SIGNAL SYSTEM
GENERAL INFORMATION
INTRODUCTION
Following are general descriptions of the major
components in the turn signal and hazard warning
systems. Refer to 8W-52 - Turn Signals in Group 8W
- Wiring Diagrams for complete circuit descriptions
and diagrams.
NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
model. Whenever required and feasible, the RHD
versions of affected vehicle components have been
constructed as mirror-image of the LHD versions.
While most of the illustrations used in this group
represent only the LHD version, the diagnostic and
service procedures outlined can generally be
applied to either version. Exceptions to this rule
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
DESCRIPTION AND OPERATION
TURN SIGNAL SYSTEM
With the ignition switch in the On or Accessory
position, and the multi-function switch control lever
moved up (right turn) or down (left turn), the turn
signal system is activated. The switch has a detent
position in each direction that provides turn signals
with automatic cancellation, and an intermediate
momentary position that provides turn signals only
until the multi-function switch lever is released.
When the turn signal switch is in a detent posi-
tion, it is turned off by one of two cancelling cam
lobes molded into the hub of the clockspring mecha-
nism. When turning the steering wheel causes one of
CONTENTS
. . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . 1
TURN SIGNAL AND HAZARD WARNING SYSTEMS
page
VEHICLE INFORMATION CENTER
DIAGNOSIS AND TESTING
INTRODUCTION
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . 3
TURN SIGNAL AND HAZARD WARNING
SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REMOVAL AND INSTALLATION
COMBINATION FLASHER
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . 5
the cam lobes to contact a cancel actuator in the
multi-function switch, the turn signal switch auto-
matically returns to the off position.
When the turn signal system is activated, the
selected (right or left) turn signal indicator lamp,
front park/turn signal lamp, front side marker lamp,
and rear tail/stop/turn signal lamp bulbs will flash.
With the headlamp switch in the Off position, the
front turn signal and front side marker lamps flash
in unison. With the headlamp switch in the On posi-
tion, the front turn signal and front side marker
lamps flash alternately.
HAZARD WARNING SYSTEM
The hazard warning system is activated by a
switch button in the multi-function switch. The but-
ton is located on the top of the steering column
between the steering wheel and the instrument
panel. The hazard warning switch button is identi-
fied with a double triangle.
The hazard warning system is connected to a non-
switched battery feed so that the system remains
functional, regardless of the ignition switch position.
Push the switch button in to activate the hazard
warning system, and push in on the button again to
turn the system off.
When the hazard warning system is activated, the
right and left turn signal indicators, front park/turn
signal lamps, front side marker lamps, and rear tail/
stop/turn signal lamps will flash.
COMBINATION FLASHER
The combination flasher is a smart relay that func-
tions as both the turn signal system and hazard
warning system flasher. The combination flasher is
designed to handle the current flow requirements of
the factory-installed lighting.
. . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . 4
8J - 1
page