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ZJ
GENERAL INFORMATION
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1
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
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.
CONTENTS
page
Vehicle Information Center . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 3
Multi-Function Switch . . . . . . . . . . . . . . . . 4
TURN SIGNAL AND HAZARD WARNING
SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
COMBINATION FLASHER . . . . . . . . . . . . . . . . . . 5
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . 6
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
8J - 1
page
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Table of Contents
Related Manuals for Chevrolet Colorado 1998
Summary of Contents for Chevrolet Colorado 1998
-
Page 1: Turn Signal And Hazard Warning Systems
TURN SIGNAL AND HAZARD WARNING SYSTEMS 8J - 1 TURN SIGNAL AND HAZARD WARNING SYSTEMS CONTENTS page page GENERAL INFORMATION VEHICLE INFORMATION CENTER ... 3 INTRODUCTION ......1 DIAGNOSIS AND TESTING DESCRIPTION AND OPERATION INTRODUCTION . -
Page 2: Warning Switch
8J - 2 TURN SIGNAL AND HAZARD WARNING SYSTEMS DESCRIPTION AND OPERATION (Continued) with an ISO-relay, or else component and vehicle calibrated flash rate or frequency. Each time the PNP damage may occur. transistor energizes the turn signal circuit, the pin 8 The combination flasher has five blade-type termi- turn signal on sense voltage will become high and nals intended for the following inputs and outputs:... -
Page 3: Turn Signal Indicator Lamp
TURN SIGNAL AND HAZARD WARNING SYSTEMS 8J - 3 DESCRIPTION AND OPERATION (Continued) DIAGNOSIS AND TESTING INTRODUCTION When diagnosing the turn signal or hazard warn- ing circuits, remember that high generator output can burn out bulbs rapidly and repeatedly. If this is a problem on the vehicle being diagnosed, refer to Group 8C - Charging System for further diagnosis of a possible generator overcharging condition. -
Page 4: Multi-Function Switch
8J - 4 TURN SIGNAL AND HAZARD WARNING SYSTEMS DIAGNOSIS AND TESTING (Continued) (3) Turn the ignition switch to the On position to should be continuity. If OK, go to Step 9. If not OK, check for battery voltage at the turn signal fuse in repair the open circuit as required. -
Page 5: Combination Flasher
TURN SIGNAL AND HAZARD WARNING SYSTEMS 8J - 5 Fig. 3 Multi-Function Switch Continuity REMOVAL AND INSTALLATION COMBINATION FLASHER WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, REFER GROUP PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. - Page 6 8J - 6 TURN SIGNAL AND HAZARD WARNING SYSTEMS REMOVAL AND INSTALLATION (Continued) (10) Reinstall the right cowl side trim panel and instrument panel at the snap clip retainer locations the fuse access panel. (Fig. 5). (8) Remove the steering column opening cover/ MULTI-FUNCTION SWITCH knee blocker from the instrument panel.
- Page 7 TURN SIGNAL AND HAZARD WARNING SYSTEMS 8J - 7 REMOVAL AND INSTALLATION (Continued) (13) Remove the tamper proof mounting screws (a (16) Reverse the removal procedures to install. Snap On tamper proof torx bit TTXR20B2 or equiva- Tighten the fasteners as follows: •...
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