relay ISUZU TROOPER 1995 Workshop Manual

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 -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
..

8-118 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)
~
•

CHASSIS ELECTRICAL 8-119
2-5 HORNS DO NOT SHUT OFF
• IS THE HORN RELAY NORMAL? I
I
I I
YES [ NO l
I
I
• REMOVE THE HORN SW I REPLACE THE HORN RELAY I
• IS THE MOVABLE PORTION OF THE HORN SW ALWAYS OUT
OF CONTACT WITH THE GROUND BRACKET?
I
I I
YES I r NO l
l I
REPAIR A SHORT CIRCUIT BETWEEN HORN RELAY HARNESS I REPAIR OR REPLACE THE HORN SW I
SIDE coNNECTOR 1 I x-sl AND lu-1ol

HORN SWITCH
~ INSPECTION (FIG. 8-153)
~~~ Check the continuity between the connector
terminal and the bracket of the switch while
operating the horn switch.
Repair
or replace the switch when the result of
inspection is found abnormal.
Fig. 8-153
B REMOVAL
Fig. 8-154
Connector
Fig. 8-155
CHASSIS ELECTRICAL 8-125
Preparation: Disconnect the battery ground cable.
1. Driver inflator module (Fig. 8-154)
• Disconnect the Supplemental Restraint Sys­
tem (SRS) -AIR BAG connector located at
lower of the instrument panel driver lower
cover.
• Remove four screws.
• Disconnect the inflator module connector.
CAUTION:
When carrying a live inflator module, make sure
the bag opening is pointed away from you. In
case of an accidental deployment, the bag will
then deploy with minimal chance of injury.
Never carry
the inflator module by the wires or
connector on the underside of the module.
When placing a live inflator module on a bench
or other surface, always face the bag and trim
cover up, away from the surface. This is
necessary so
that a free space is provided to
allow the air bag to expand in the unlikely event
of accedental deployment.
2. Horn switch (Fig. 8-155)
• Remove the screws.
• Disconnect the switch connector.
l·u·IINSTALLATION
To install, follow the removal steps in the reverse
order, noting the
following point.
1. When connect the double lock type of inflator
module connectors, insert the connector
completery and lock at outside. Imperfect locking
may cause malfunction of Supplemental
Restraint System (SRS)-AIR BAG circuit.
HORN RELAY
Fig. 8-156

8-126 CHASSIS ELECTRICAL
~ INSPECTION
lt!ll Check to see if there is any continuity between
the
relay terminals. (Fig. 8-156)
Replace the
relay when the result of inspection
is
found abnormal.
®-@ ....... No continuity
(When the battery voltage is applied between
®-@ ....... Continuity
CORNERING LIGHT RELAY
~ INSPECTION
Fig. 8-157
r1il Check to see if there is any continuity between
1.!!!.1 the relay terminals. (Fig. 8-157)
Replace the relay when the result of inspection
is
found abnormal.
®-@ ....... No continuity
(When the battery voltage is applied between
®-@ ....... Continuity
NOTE:
For the relay removal, refer to "Connector
Handling" in the "NOTES FOR WORKING ON
ELECTRICAL ITEMS" in this section.
•

, 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