fuse ISUZU TROOPER 1995 Workshop Manual

CHASSIS ELECTRICAL 8 -99
2-1 REAR DEFOGGER DOES NOT OPERATE
• ARE THE FUSES C-4 (10Al AND C-17
I (25Al NORMAL?
I
I
YES I NO l
I
• IS THE REAR DEFOGGER RELAY NORMAL? REPLACE THE FUSE. I
I
I
YES I NO I
1
• IS THE REAR DEFOGGER SWITCH NORMAL? I REPLACE THE RELAY I
I
I
YES I NO I
I
• ARE WJ AND ~GROUNDED SECURELY? I REPAIR OR REPLACE THE SWITCH.l
I
I
YES I NO I
I
• TURN ON THE STARTER SWITCH AND THE REAR DEFOGGER
GROUND THEM SECURELY. I SWITCH.
• IS THERE A BATIERY VOLTAGE APPLIED BETWEEN THE REAR DEFOGGER CONNECTOR 1 ~ AND THE GROUND?
I
I
YES I NO l
I
REPAIR A POOR CONNECTION OF THE REPAIR A POOR CONNECTION AT THE
CONNECTORS CONNECTORS OR AN OPEN
CIRCUIT IN
OR AN OPEN CIRCUIT BETWEEN 1[]TI EACH OF THE FOLLOWING
AND[BTI CONNECTIONS: FUSE C-17 (25Al AND
2 I B-38 • FUSE C-4 (10Al AND 31 B-38 I.
4
1B-38 AN~,4~AND 1 ~ , 5 1-17 AND B-19
.

8 - 1 06 CHASSIS ELECTRICAL
TURN SIGNAL LIGHT, HAZARD WARNING LIGHT,
CORNERING LIGHT,
BACKUP LIGHT AND HORN
GENERAL DESCRIPTION
The circuit consists of the starter switch, lighting switch, turn signal/cornering switch (combination witch),
turn signal light, cornering light, hazard warning switch, flasher unit, mode switch (A/T), backup light switch,
backup light, horn switch and horn.
When
turning on the respective switches with the starter switch on, the turn signal light and the back p light
will operate. When the turn signal light is flashing, the indicator light in the meter also starts flash in .
When the hazard
warning switch is turned on, the current flows to the flasher unit through the hazard
warning switch to cause the hazard warning light to flash, independent of the position of the starter switch.
At the same time, the indicator lights in the meter also start flashing.
When the
turn signal lever is set in either the left or right direction while the headlight is on, the co nering
switch incorporated
into the combination switch is activated to illuminate the appropriate cornering I ght.
When the horn switch is turned on, (independent
of the position of the starter switch) the relay is acti ated to
sound the horn.
OPERATION OF TURN SIGNAL AND CORNERING LIGHT CIRCUIT
Turn signal and cornering light
CORNERING RELAY
TURN
SIGNAL
/CORNERING FUSE
F-4
~+---------.
Ll G
HT SW L......f-'-=-~--l
STARTER SW
HAZARD
WARNING
sw
NOTE: Arrow marks " ~ " indicate the direction of current
Fig. 8-135
Hazard warning light
D
BATTERY(+)
HAZARD~ WARNING L.f-~'-'----f--' sw
lB
TURN SIGNAL LIGHT
(FLASH)
:z: _J 2: a: :::J 1-
li}
:z: a: 2: a: :::J 1-
~
METER (FLASH)
•

-n 10' 00 I .... w 0>
(
RELAY:
CORNERING LIGHT
DIODE

RELAY;HORN
\
RELAY
& FUSE
BOX'·.,,
(FL-1, FL-2,
F-31
~.
"",
BATTERY
'
FRT
TURN
SIGNAL,
HAZARD.
WARNING LIGHT
(RH) /
CORNERING LIGHT
(RH) C-31 HORN (HIGH)
( TURN
SIGNAL,
HAZARED
WARNING
INDICATOR LIGHT
(METER)
(
COMBINATION
SW
HAZARD
WARN
IN~
LIGHT
SW

FRT TURN
SIGNAL,
HAZARD
WARNING
LIGHT
(LH)
CORNERING LIGHT
(LH)
LIGHTING
SW
TURN
SIGNAL LIGHT,
/~l/
~/
CORNERING LIGHT SW. RR
TURN
SIGNAL,
HAZARD
WARNING LIGHT (LHI
=·
BACKUP
B-53
LIGHT(LH) "R-7 TRAILER HARNESS
CONNECTOR
FLASHER
UNIT
FUSE
BOX (C-3)
BACKUP LIGHT SW, (MfTI
)g ~ (/) r-0 (") ~ 0
2
(") ::c )> en
en en m r­m (") -i :lJ (") )> r­QI) I ..a 0 .....

8 -108 CHASSIS ELECTRICAL
CIRCUIT DIAGRAM
+ o-___,f.=8C.::BI::..:R'-l
B
B
~~P-1ol~ BODY ENG. FRAME
RELAY;TAILI31
ITO PAGE 8-781
OFF
BOOY-LH II
FENOER-LH II
BOOY-RR II
"' ., 0
19 H-7
~ > ::: ::: 0
0
:z: :z: ;! 0:
"" r :z: " " :J :J " " z z ffi ii! w z z 0:
0: 0 0 " "
"' ~ "' ., 0
0.85 v
0.85Y/R
~
" :J
"' z !2 ., z 0: ::> 1-
1-
1£
"' "' 0 "'
.---"'0·:::;85::.:RIL=-----+ FUSE F-4 (TO PAGE 8-50)
.-----'2'-'B~iR,___-jH-20 If-------,
O.SB
"' ~ a II! ::: 0
TRAILER HARNESS CONNECTOR
(TURN SIGNAL LIGHT)
1.25B "' "' "' 0
Fig. 8-137
C-3 38/G 15A TURN, BACK 0.85 RIB
0.85 RIB
0.85 RIB
2G/O
5~;1 !=w' ~: ~~; g :e· ~~~
=
:~co ! ~ _ut:
~ I!! ~ z !5 i: 1 :z: "'' ~ ...,, 0' 5 "' "' IH-,10 I ... il! 0 "! 0 0.85 RIL ' '
"' "' 0 1 H-25
:z: ~
"' r "' ;t 0 :z:
" :J .._ ::> "" ~
"' "' ..
..

CHASSIS ELECTRICAL 8 -111
DIAGNOSIS
QUICK CHART FOR CHECK POINTS
1. Turn signal light, hazard warning light, and cornering light
~·
Fuse
Turn Ha-Turn Cornering Cornering Cable Flasher C-3 F-3 cornering
zard
unit signal light light harn-
e (15A)
(15A)
sw
sw bulb bulb relay ess
1-1 Turn signal light does not 0
0 0 0 0
flash. (1) (4) (3) (2) (5)
1-2 Turn
signal light flashes 0 0
too quickly. (1) (2)
1-3 Both
cornering lights 0
0 0
0
inoperative. (1)
(4) (3) (2)
1-4 Cornering light on the left 0 0 0
(or
right) side inoperative. (2) (1) (3)
1-5 Cornering light remains on. 0 (1)
NOTE: Figure in parenthesis"{ )"indicates the order of inspection.
2. Backup light, horn
~·
Fuse
Backup Backup
Horn Horn Cable C-3 F-3 light SW/ light Horn switch relay
harness
e {15A) {15A) modeSW bulb
2-1 Both
backup lights inoperative. 0 0 0 (1) {3) {2)
2-2 Backup light on
the left (or right) 0 0
side do not light up {1) (2)
2-3 Backup lights remain on. b {1)
2-4 Horns do not sound. 0 0
0
0 0 {1) (4) {5) {2) (3)
2-5 Horns do not shut off. 0 0 0 {2) (1) (3)
NOTE: Figure
in parenthesis "{ )" indicates the order of inspection.

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
•

8 -114 CHASSIS ELECTRICAL
1-3 BOTH CORNERING LIGHTS INOPERATIVE
~ : ...
DO THE HEADLIGHT LIGHTS COME ON? I •
I
YES
I NO I
1
• IS FUSE C-3 {15A) NORMAL? I TURN THE HEADLIGHT ON. {REFER TO DIAGN
PSIS
CHART
FOR HEADLIGHT.)
I
YES
I NO I
I
• IS 5 IC-161 GROUNDED SECURELY? REPLACE THE FUSE I
I
YES
I NO I
I
• DISCONNECT THE CONNECTORS AT THE CORNERING RELAY . GROUND IT SECURELy I
• TURN ON THE STARTER SWITCH AND THE LIGHTING SWITCH .
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE
RELAY
HARNESS SIDE CONNECTOR 3 IX-221 AND GROUND, AND NBETWEEN 4 IX-221 AND GROUND?
~
I
YES
I NO I
I
• IS THE CORNERING RELAY NORMAL? I REPAIR A POOR CONNECTION OF THE CONNEC TORS
OR AN OPEN CIRCUIT BETWEEN FUSE C-3 ~ 3 IX-221 OR BETWEEN FUSE F-4 {15A)-4 X-2~
I
YES
I NO I
I
• DISCONNECT THE CONNECTORS AT THE TURN SIGNAL/ REPAIR OR REPLACE THE RELAY I CORNERING LIGHT SWITCH.
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE
SWITCH HARNESS SIDE CONNECTOR 11IB-12I AND GROUND?
I
YES
I NO I
I
• IS THERE CONTINUITY BETWEEN THE CORNERING LIGHT REPAIR A
POOR CONNECTION AT THE CONNI;,C
SWITCH CONNECTORS
11IB·121-i IB-yl {WHEN TORS OR AN OPEN CIRCUIT BETWEEN 2IX-22I
TURNING LEFT), AND BETWEEN 11 B-12 -10 IB-121 AND 11IB-12I
~ {WHEN TURNING RIGHT)?
I
YES
NO I
cbNTINUED ON THE FOLLOWING PAGE I CONTINUED ON THE FOLLOWING PAGE
..

-
8-116 CHASSIS ELECTRICAL
2-1 BOTH BACKUP LIGHTS INOPERATIVE
• IS FUSE C-3 (15A) NORMAL? I
I
I
YES I
I
• IS ~GROUNDED SECURELY? I
I
I
YES I
I
• TURN THE STARTER SW ON
• IS THE BATIERY VOLTAGE APPLIED BETWEEN THE
MODE
SW lOR BACKUP LIGHT SW) HARNESS SIDE coNNECTOR 5 I C-431 11 I M-al >AND THE GROUND?
I
I
YES .J
I
• SET THE TRANSMISSION GEAR TO THE REVERSE POSITION
• WITH
THE MODE SW !OR BACKUP LIGHT SW) CONNECTOR
DISCONNECTED, IS THERE CONTINUITY BETWEEN SWITCH
SIDE
coNNECTORS 2 lc-431 AND 5 I C-431 11 I M-al AND 1 IM-91 )?
I
J
YES I
I
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 2 I C-431 ( 1 I M-91 ) AND 9 I H-321
I
NO j
I
REPLACE THE FUSE j
I
NO I
I
GROUND IT SECURELY I
I
NO I
I
REPAIR AN POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C-3 15A)
AND 5 lc-431 !OR 1 I M-al 1
I
NO I
I
REPAIR OR REPLACE THE MODE SW (BACKUP LIGHTSW)
NOTE: Connectors in parenthesis "( )" indicates the model with manual transmission.
..

8-118 CHASSIS ELECTRICAL
2-4 HORNS DO NOT SOUND
~ ''
• IS FUSE F-3 (15A) NORMAL? I
I
YES j NO I
I
• IS HORN BODY GROUNDED SECURELY? I I REPLACE THE FUSE I
I
YES I NO I
I
• DISCONNECT THE HORN RELAY CONNECTOR GROUND IT SECURELy I
• IS THE BATIERY VOLTAGE APPLIED BETWEEN 2 I X-8 I
AND THE GROUND?
I
YES I NO I
I
• IS THE HORN RELAY NORMAL? I REPAIR A POOR CONNECTION AT THE CONNE TORS OR AN OPEN CIRCUIT BETWEEN FUSE F-3 (15.4
AND 21 X-81
~
I
YES NO I
I
• DISCONNECT THE HORN SW CONNECTOR . REPLACE THE RELAY J
• IS THE BATIERY VOLTAGE APPLIED BETWEEN lu-101
AND THE GROUND?
I
YES I NO J
I
• IS THE HORN SW NORMAL? I REPAIR A POOR CONNECTION AT THE CONN~ ~RS OR AN OPEN CIRCUIT BETWEEN 11 X-8 I AND ~ 0
I
YES / NO /
I
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN REPAIR OR REPLACE THE HORN SW
OPEN CIRCUIT BETWEEN 31 X-8 I AND 1IC-27l (11 C-281) (COMBINATION SW)
~
•

, 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