Chevrolet Colorado 1998, Manual

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TURN SIGNAL AND HAZARD WARNING SYSTEMS
CONTENTS
page page
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
COMBINATION FLASHER . . . . . . . . . . . . . . . . . . 1
HAZARD WARNING SYSTEM . . . . . . . . . . . . . . . 1
TURN SIGNAL INDICATOR LAMP . . . . . . . . . . . 3
TURN SIGNAL LAMP . . . . . . . . . . . . . . . . . . . . . 3
TURN SIGNAL SWITCH AND HAZARD
WARNING SWITCH . . . . . . . . . . . . . . . . . . . . . 2
TURN SIGNAL SYSTEM . . . . . . . . . . . . . . . . . . . 1
VEHICLE INFORMATION CENTER . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 3
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . 4
TURN SIGNAL AND HAZARD WARNING
SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REMOVAL AND INSTALLATION
COMBINATION FLASHER . . . . . . . . . . . . . . . . . . 5
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . 6
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.
DESCRIPTION AND OPERATION
TURN SIGNAL SYSTEM
With the ignition switch in the On position, and
the multi-function switch control lever moved up
(right turn) or down (left turn), the turn signal sys-
tem is activated. The switch has a detent position in
each direction that provides turn signals with auto-
matic cancellation, and an intermediate momentary
position in each direction 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
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 con-
tains active electronic Integrated Circuitry (IC) ele-
ments. This flasher is designed to handle the current
flow requirements of the factory-installed lighting. If
supplemental lighting is added to the turn signal
lamp circuits, such as when towing a trailer with
lights, the combination flasher will automatically try
to compensate to keep the flash rate the same.
While the combination flasher has a International
Standards Organization (ISO)-type relay terminal
configuration or footprint, the internal circuitry is
much different. The combination flasher does not use
standard ISO-relay inputs or provide ISO-relay type
outputs or functions. The combination flasher should
never be substituted for an ISO-relay or replaced
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