warning light ISUZU TROOPER 1995 Repair Manual

8-112 CHASSIS ELECTRICAL
1-1 TURN SIGNAL LIGHT DOES NOT FLASH
~ ..
I • IS FUSE C-3 (15A) NORMAL?
I
YES
I NO I
I
• IS THE FLASHER UNIT NORMAL? I REPLACE THE FUSE I
I
YES
I NO I
I
• DISCONNECT THE CONNECTORS OF THE HAZARD REPLACE
THE FLASHER UNIT
WARNING SWITCH
• TURN THE STARTER SWITCH ON .
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE
HAZARD WARNING SWITCH HARNESS SIDE CONNECTOR 8 WJ] AND THE GROUND?
I
YES
I NO I
I
• WITH THE HAZARD WARNING SWITCH TURNED OFF, IS REPAIR A POOR CONNECTION AT THE CONNEC ORS THERE CONTINUITY BETWEEN
THE SWITCH CONNEC-OR AN OPEN CIRCUIT BETWEEN THE FUSE C-3 ( SA) ~ TORS 7 [Iill AND 8 WJ] 7 8!ITIJ.
I
YES
J NO I
I
• DISCONNECT THE CONNECTORS OF THE FLASHER UNIT • REPAIR OR REPLACE THE SWITCH I • IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE FLASHER UNIT HARNESS SIDE CONNECTOR 1 IB-531 AND THE GROUND?
I
YES
I NO I
I
• IS IB-191 GROUNDED SECURELY? I REPAIR A POOR CONNECTION AT THE CONNEC ORS
OR AN OPEN CIRCUIT BETWEEN THE HARNESS SIDE
CONNECTORS 7 WJ] -1IB-53I.
I
YES
I NO I
I
• IS THERE CONTINUITY BETWEEN THE HARNESS SIDE GROUNDED IT SECURELY I CONNECTORS 3IB-s3l -IB-191 7
~
I
YES
I NO I
I I
CONTINUED ON THE FOLLOWING PAGE CONTINUED ON THE FOLLOWING PAGE
•

TURN SIGNAL LIGHT BULB
FRONT SIDE (FIG. 8-141)
Fig. 8-141
B REMOVAL
Preparation: Disconnect the battery ground cable.
1. Front combination light
• Remove the screw at the upper portion of the
light bracket, and remove the bracket from
the fender.
2. Bulb
• Remove the turn signal light socket by
turning it counterclockwise.
• Remove the bulb by turning it counter­
clockwise
while pushing it at the same time.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
REAR SIDE (FIG. 8-142)
~ Fig. 8-142
B REMOVAL
Preparation: Disconnect the battery ground cable.
CHASSIS ELECTRICAL 8-121
1. Rear combination light
• Remove the three screws and release the lock
at
two positions.
2. Turn signal light socket/bulb
• Remove the socket by turning it counter­
clockwise.
3. Bulb
• Remove the bulb by turning it counter­
clockwise
while pushing it at the same time.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
CORNERING LIGHT BULB
Fig. 8-143
EJ REMOVAL (FIG. 8-143)
Preparation: Disconnect the battery ground cable.
1. Front combination light
• Remove the screws at the upper portion of
the light bracket, and remove the bracket
from the fender.
3. Bulb
• Remove the cornering light bulb socket by
turning it counterclockwise.
• Remove the bulb by turning it counter­
clockwise while pushing it at the same time.
E) INSTALLATION
To install, follow the removal steps in the reverse
order.
HAZARD WARNING SWITCH
~ INSPECTION
rfll Check the continuity between the terminals of
~ the hazard warning switch. (Fig. 8-144)
Repair
or replace the switch when the result of
inspection is found abnormal.

8-122 CHASSIS ELECTRICAL
rn
~~:::1
ill I -
~I . 4 s 6 7 8 2 1 3 n
ON o--o-f-0 0 -o
~ OFF o--o
Fig. 8-144
B REMOVAL (FIG. 8-145)
Preparation: Disconnect the battery ground cable.
5. Hazard warning switch 4. Instrument panel
cluster assembly
I
I
3. Instrument / panel driver lower cover ,
This illustration is based on re-ar defogger SW removal.
Fig, 8-145
'(
1. Front console assembly
2. Lower cluster assembly
3. Instrument panel driver lower cover
4. Instrument panel cluster assembly
• Refer to FOG LIGHT SWITCH remov I steps
in this section.
5. Hazard warning switch
• To remove the switch, pushing the lo k from
the back side of the cluster assembly.
B INSTALLATION
To install, follow the removal steps in the everse
order, noting the
following point
1. Push in the switch with your fingers until t locks
securely.
FLASHER UNIT
~ INSPECTION
When a SSW bulb is connected to the u it side
terminals No. 1(L) and 3(E) while connecti g the
battery
(+) terminal to terminal No. 1(8), nd the
battery (-)
terminal to terminal No. 3(E), d es the
bulb light on and off? (Fig. 8-146)
~
•

8-128 CHASSIS ELECTRICAL
DOME LIGHT, LUGGAGE ROOM LIGHT, COURTESY LIGHT,
MAP LIGHT, SEAT BELT SWITCH AND WARNING BUZZER
GENERAL DESCRIPTION
This circuit consists of the starter switch, door switch, dome light, luggage room light, courtesy lig t, map
light, seat belt switch, key remind switch and warning buzzer.
The dome
light lights up when any one of doors except the tailgate is opened with the switch set at t e door
mode. (Vehicles with a built-in timer do not have door mode.) !
The courtesy lights for the front doors are controlled by a circuit different from the one which cont ols the
courtesy
lights for the rear doors. When a door is opened, the lights on both sides in either front or r ar seat
light up.
The
luggage room light illuminates by opening the tailgate when the switch is set at the door mode.
The
map light illuminates by turning the switch on.
All these lights light up by turning on respective switches regardless of the position of the starter swi ch key.
The
warning buzzer sounds to remind the driver of seat belt use, leaving the key in the starter sv.. tch, or
headlights were left on.
OPERATION OF THE CIRCUIT
BATIERY (+) _....,.=>..:.__ _________ =>~---------lij
l} :X: :X: ...J a: ~ ~ :X: :X: Q .....__ (.!) ...J :J
~~ ®~ II: li: :::> r----:::> 0 0 u u a: a:
a: a:
z Q r---t----,
~ Go (.!) :J w ON OFF 0 0
~ DOOR 0 '-----+------'
~----------~~~~~~~~lr-l ____________ ,_b __ +-~~~-'--~'---,~ II...... 111"""11 Ill"""' J
-:..._ -=-
RRDOORSW RRDOORSW -LH -RH
DIODE DIODE
-=­
FRTDOOR SW -RH
NOTE: Arrow marks u =:> H indicate the direction of current
Fig. 8-158
FRTDOOR W -LH (ON)
•

, ce· co I .... U1 co
(
RR
DOOR
SW
(RH)
, '-..__
RR
COURTESY LIGHT
(RH)
, ,
~
MAP
LIGHT~
FRT
DOOR
SW
(RH)
,
~,
~
,·

"·,.
FRT
COURTESY LIGHT (RH),
\\,
:~~ /,
' ;. >,I
H-21
(\
/~~

\,
SEAT
BELT,
KEY
&LIGHT
B-1,
REMIND BUZZER
~
""
~
H-12,""
RELAY & FUSE
BOX,
~
14
',,
(FL-1, FL-2)
'~
'
BATIERY
FUSE
BOX IC-10, C-16)
( DOME
LIGHT
/ 1 LUGGAGE
ROOM
LIGHT
1-9 SEATBELTWARNING
LIGHT
, TAILGATE
SW
/
RR
DOOR
SW(LH)
I(Y.£!
= /
I RR
COURTESY
LIGHT(LH)
~11
) I
FRT
DOOR
sw.
(LH)
-
I.
B-22
FRT
COURTESY LIGHT
(LH)
KEY
REMIND SW,
(STARTER
SW)
SEAT BELT
SW
(LH)
(
~ :lJ ~ r-0 0 ~ 0 2
0 :c 1:i en 0 m I""' m 0 -t ::0 cs )> I""' co I ...a N CD

, co CX) . ... Ol ...
( --.. ..
.. 0 0 0 ~
~
0 <
!:l
,;,
,;,
"'
X
,
------------------------------~
. :g :~ ,c •"' ,x . ... :~ ·-•!: om :2!
--------------------------------·
FRT
DOOR
SW-RH
O.SGR/W
2B
O.SB
O.SB/W
~ C> ~
O.SGR/W
( ,,o.J-.r.~ FRT COURTESY
UGHT-LH
FRT
COURTESY
UGHT-RH
O.SR/W
O.SR!W
RELAV;TAILI•I ITO PAGE
8-781
KEY
REMIND
SW
CST ARTER
SW1
O.SR/W O.SR/W
O.SR/W
O.SR/W O.SlJY
8 !:
0 ., "'[;] ~ .;. ,,
mf"Yl ~liJ•Ik-
lb I ill
ill?j
~~., !~
~ :~ I h
.. !!' "'
II
O.SlJY
II~ I
O.SLJV
I
~ 0
SEAT
BELT
WARNING
LIGHT
(
(") -::0 (") c =i c 5> C) ::0 )> s I CJ) :I: 0 ~ ~ :I: m
m r-to )> CJ) m I I I
() :::t )> en
en (i) m r-m () -1 :c 0 )> r-QO I ..a w ..a

8 -136 CHASSIS ELECTRICAL
MAP LIGHT SWITCH/BULB
~ INSPECTION
~~~ Check to see if there is any continuity between
the terminals and the body while operating the
map light switch.(Fig.8-171)
Repair
or replace the switch when the result of
inspection is found abnormal.
I" ~ [IT]
ron
0~/~ ~
'
~· 1 Body
n
ON 0 {)
OFF
Fig. 8-171
B REMOVAL
E) INSTALLATION
To install, follow the removal steps in the everse
order.
SEAT BELT SWITCH
~ INSPECTION
I~ l Check to see if there is any continuity b tween
the terminals of the seat belt switch. (Fig 8-173)
Replace the switch when the
result of ins ection
is found abnormal.
Switch operation
ON (unfasten the seat belt)
OFF (fasten the seat belt)
Preparation: Disconnect the battery ground cable. Fig. 8-173
Fig. 8-172
1.
Map light switch
• Pull the map light body downward to release
the
lock. (Fig. 8-172)
• Disconnect the connectors of the map light
and the sun roof switch.
2. Socket/bulb
• Turn the socket counterclockwise to remove
it.
3.
Bulb
• Pull out the bulb from the socket.
B REMOVAL AND INSTALLATION
1++1 Refer to Section 10 "BODY", for "SEAT ELT"
removal and installation steps.
WARNING BUZZER
The warning buzzer sounds to remind the dr ver to
fasten seat belts, if the key was left in the tarter
switch,
or if the headlights were left on. (Fig. -174)
Seat belt warning light
Seat belt
sw
Starter sw
8
Warning buzzer
DoorSW (Driver
side)
Fig. 8-174
..

CHASSIS ELECTRICAL 8-137
Warning function
Operational conditions
The
warning light in the meter assembly turned on about 6
seconds
from the moment the starter switch is turned on.
Fasten the seat
belt
The buzzer sounds for about 6 seconds when the starter switch
is turned on with the seat belt switch on (when the seat belt is
not used).
Key left in The
buzzer sounds when both the key remind switch and the
FRT
door switch -LH are turned on.
starter switch
To
stop the sound of the buzzer, turn on the starter switch.
Taillights left on The
buzzer sounds when the starter switch is turned
from the
"on• to "off" position while the taillights are on.

8-138 CHASSIS ELECTRICAL
~ INSPECTION
~ Inspection of the warning buzzer circuit ,,,
~ Remove the warning buzzer connector to mea-
sure the continuity and
voltage between the
harness side connector terminals. (Fig. 8-175)
~
-Harness side
Terminal Wire Connected Item to be Connecting Checking Standard color to checked terminal conditions
When Continuity
unfastened
5 L Seat belt SW Continuity 5-Ground Seat belt When No continuity
fastened
3 G/R Tail relay 3-Ground Lighting switch ON Approx. 12V
Key reminder inserted Approx. 12V
~ 4 P/L sw Voltage 4-Ground Starter
(Starter SW)
key
removed ov
6 L/Y Fuse C-10
(lOA) 6-Ground Starter switch ON Approx. 12V
Door switch open Continuity
1 GR/R (on driver's 1-Ground FRT
seat
side) Continuity door-LH No continuity closed
2 B Ground
2-Ground -Continuity
Fig. 8-175
~

8 -178 CHASSIS ELECTRICAL
ANTI-LOCK BRAKE SYSTEM (ABS)
GENERAL DESCRIPTION
The circuit consists of the starter switch, stoplight switch (vehicle w/o cruise control), brake switch (vehicle
with cruise control), hydraulic unit, electronic brake control module, wheel speed sensor, G sensor, ABS and
4WD indicator, 4WD switch and data link connector.
When the service brake is applied while in the running mode,
the EBCM (Electronic Brake Control Module)
judges
which wheel is about to lock by using the wheel rotation speed signals sent from the four ABS speed
sensors at the
front and rear wheels. And the brake fluid pressure applied to the four wheels is controlled by
a hydraulic unit to prevent the wheels from locking.
Based on the wheel rotation speed signals
input from the ABS sensor, the EBCM sends out signals to the
solenoid valve in the hydraulic unit
to increase, maintain or decrease the brake fluid pressure. The solenoid
valve uses this signal
to control the fluid pressure which is applied to the calipers of the disk brakes of the
front wheels. (The system also controls at the same time the fluid pressure applied to the rear wheels.)
• EBCM (Electronic brake control module)
The EBCM uses the signals sent from the speed sensor to control the operation of the hydraulic unit.
When any malfunction occurs in the ABS, the
EBCM activates the fail-safe fuction while turning on the
ABS warning light.
• Hydraulic unit
The hydraulic unit consists of the motor, plunger pump, solenoid valve, and fluid pressure control
valves. The exterior
of the unit has a relay box consisting of the motor relay and valve relay. Three
solenoid valves, the
two of which are provided at the front wheels and the one at the rear wheels, control
the fluid pressure
of these wheels.
• Speed sensor
The speed sensor consists of the sensor and the rotor. It sends the EBCM the AC voltage generated by
the rotation of the rotor as the vehicle speed signal. ~
• G-sensor
The G-sensor, installed inside the center console, sends out signals to the EBCM by detecting the
decelerating speed
of the vehicle.
• ABS warning light
The ABS warning light in the instrument panel, lights up when any malfunction occurs in the ABS. It also
lights up
with the starter key at the "ON" position, as a self-check.
Refer
to Section 5A4, "ANTI-LOCK BRAKE SYSTEM" for detail.
II