horn ISUZU TF SERIES 2004 User Guide

ELECTRICAL-BODY AND CHASSIS 8A-131


LICENSE PLATE LIGHT
Removal
1. Remove the lens cover 1 and the connector 2.
2. Pull the bulb
3 to remove it.



Installation
Follow the removal procedure in the reverse order to install the
license plate light.
Pay close attention to the important points mentioned in the
following paragraphs.



Bulb
Be absolutely sure that the license plate light bulb is correctly
installed.
This will prevent a poor contact and open circuit.



HEADLIGHT BEAM SWITCH
(COMBINATION SWITCH)
Removal
1. Disconnect the battery ground cable.
2. Remove the screws on the lower part of the steering wheel.
3. Remove the horn pad.
4. Remove the wiring connector.
5. Remove the steering wheel fixing nuts.
6. Remove the steering wheel.
Refer to the "STEERING" Section of this manual.
7. Remove the Instrument panel lower cover.
8. Remove the steering column cover.
9. Disconnect the connector.
10. Remove the headlight beam switch (lever) from the steering
shaft (combination switch).


Installation
Follow the removal procedure in the reverse order to install the
headlight beam switch (lever).
Pay close attention to the important points mentioned in the
following paragraphs.



Connector
Be absolutely sure that the headlight beam switch connector is
securely connected.
This will prevent a poor contact and an open circuit.

ELECTRICAL-BODY AND CHASSIS 8A-161
HAZARD WARNING FLASHER, TURN SIGNAL LIGHT, BACK UP
LIGHT, HORN AND STOP LIGHT
PARTS LOCATION (RHD)






RTW48AXF016601 & RTW48AXF016701

ELECTRICAL-BODY AND CHASSIS 8A-171
HORN
1. Both sides of horn do not sound

Checkpoint Trouble Cause Countermeasure



Repair the grounding point

Poor ground contact
NG

Horn relay


Grounding point


Reinstall or replace fuse No.
EB-15 (10A)

Fuse No EB-15 (10A, Relay
and fuse box)

Poor fuse contact or blown
fuse
NG
OK OK

Reinstall or replace the horn
relay

Poor relay contact or faulty
horn relay
NG
Voltage between connector
3
X-3 - ground or 1 X-3
- ground (Should be battery
voltage present) OK

Repair open circuit or
reconnect the connector
Open circuit or poor connector
contact between fuse No. EB-
15 (10A) and horn relay
NG

Remove steering pad and
steering wheel
OK

Horn switch continuity
OK
Repair or replace the horn
switch

Poor switch point contact or
faulty switch
NG
Continuity between
4
X-3 - 10 B-60
2
X-3 - 1 C-20 (1 C-21) OK

Repair open circuit or
connector contact

Open circuit or poor connector
contact
NG

8A-172 ELECTRICAL-BODY AND CHASSIS
2. One side of horn does not blow

Checkpoint Trouble Cause Countermeasure

Repair open circuit or
reconnect the connectorOpen circuit or poor connector
contact NG
Voltage between 1 C-20
(1 C-21) - ground with
horn switch depressed
(Should be battery voltage
present)
Replace the horn assemblyHorn continuity between
connectorsFaulty horn assembly NG
OK



3. Insufficient horn volume

Clfean and/or remove the
foreign materialStain foreign material in the
horn NGHorn
Recharge or replace the
batteryBattery conditionDischarged battery NG
OK

8A-178 ELECTRICAL-BODY AND CHASSIS
BACK UP LIGHT SWITCH
Removal
1. Disconnect the battery ground cable.
2. Disconnect the connector
1.
3. Remove the back up light switch from the transmission
2.



Installation
Follow the removal procedure in the reverse order to install the
back up light switch.
Pay close attention to the important points mentioned in the
following paragraphs.



Back up Light Switch Threads
Apply liquid gasket to the threaded portion and install the back
up light switch.



Connector
Be absolutely sure that the back up light connector is securely
connected.
This will prevent a poor contact and an open circuit.

HORN
Removal
1. Remove the radiator grille.
Refer to the “HEADLIGHT” removal procedure.
2. Loosen the horn bolt.
3. Disconnect the horn connector.


Installation
Follow the removal procedure in the reverse order to install the
horn.
Pay close attention to the important point mentioned in the
following paragraphs.



Connector
Be absolutely sure the horn connector is securely connected.
This will prevent a poor contact and open circuit.

ELECTRICAL-BODY AND CHASSIS 8A-179

HORN SWITCH
Removal
1. Disconnect the battery ground cable.
2. Disable the SRS (Refer to “Disabling the SRS”in this
section).
3. Check the both side hole of the steering cover.


4. Check the position of the pins in a hole. Push the pin in the
direction of an arrow.


5. Push the four pins at 56 mm bar.

6. Cancel the lock four pins.
7. Disconnect the SRS air bag connector and horn lead
connector located behind the air bag assembly and remove
the air bag assembly.

Installation
1. Connect the SRS bag connector and horn lead connector.
2.
Align the each snap stud of driver air bag to the hole of
steering wheel.

8A-420 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
B-55
White
J/B I3 B-65
SilverWeld splice 2 (Ground)
B-56
White
J/B I4 B-66
White44 switch
B-57
White
HVAC control unit B-67
(6VE1)
BlackCruise main
B-58
Black
Check connector B-68
(6VE1)
(4JH1-TC)
Immobilizer
B-59
White
Combination switch-A B-69
Door lock switch
B-60
White
Combination switch-B B-70
(6VE1)
(4JH1-TC)
Immobilizer Coil
B-61
Black
Flasher relay B-71
YellowHorn
B-62
White
Ignition switch (IGSUB : G1) B-72
YellowSRS
B-63
White
Ignition switch (IGSUB : G2) B-73
BlackWeld Splice 3
B-64
Silver
Weld splice 1 (Illumination) B-74
WhiteCellular phone

8A-422 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
C-1
Gray
Side turn lamp-RH C-22
Front turn lamp-RH
C-2
Silver
Engine room-RH ground C-23
NOT USED
C-3
(6VE1)
(4JH1-TC)

INT Relay C-24
Triple pressure switch
C-4
Light-
blue
Front wiper motor C-25
NOT USED
C-5
~
C-16 NOT USED C-26
Black
Head lamp-LH
C-17
Gray
Front wiper motor C-27
Clearance lamp-LH
C-18

Clearance lamp-RH C-28
~
C-29 NOT USED
C-19
Black
Head lamp-RH C-30

BlackEngine hood switch
C-20
(6VE1)
(4JH1-TC)

Horn ; high note C-31
~
C-34 NOT USED
C-21
Black
Horn ; Low note C-35
Gray Side turn lamp-LH

8A-424 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
C-68
~
C-76 NOT USED C-106
NOT USED
C-77

Clutch switch C-107
WhiteJ/B E2
C-78
~
C-93 NOT USED C-108
White
J/B E1
C-94
(6VE1)
Gray TCM-(A) C-109
SilverBody-LH ; ground
C-94
(4JH1-TC)
White TCM C-110
~
C-114NOT USED
C-95
(6VE1)
White TCM-(B) C-115
(4JH1-TC)
BrownEVRV
C-95
(4JH1-TC)
White TCM C-116


C-96
~
C103 NOT USED C-117
(6VE1)
(4JH1-TC)
Anti theft horn
C-104
Brown
Resister C-118
(4JH1-TC)
A/C Resister & Neutral switch
C-105
White
Blower motor C-119
(6VE1)
Auto cruise actuator

8A-440 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
X-1
Black
Relay ; Tail lamp X-8
(4JH1-TC)
BlackRelay ; Starter
X-2
(C24SE)
(6VE1)
Black Relay ; Front Fog lamp X-9
(6VE1)
(4JH1-TC)
BlackRelay ; Hazard-RH
X-2
(4JH1-TC)
Black Relay ; Front Fog lamp X-10
(6VE1)
(4JH1-TC)
BlackRelay ; Hazard-LH
X-3

Relay ; Horn X-11
BlackRelay ; Heater
X-4

Relay ; Dimmer X-12
BlackRelay ; Head lamp
X-5
(6VE1)
Black Relay ; Front Fog Lamp X-13
(6VE1)
(4JH1-TC)
BlackRelay ; ECM MAIN
X-5
(4JH1-TC)
Black Relay ; Spill valve X-14

BlackRelay ; A/C Compressor
X-6
(C24SE)
(6VE1)
Relay ; Starter X-15
BlackRelay ; Thermo
X-6
(4JA1-L)
Black Relay ; CSD X-16
(6VE1)
(4JH1-TC)
BlackDIODE
X-7

Relay ; Condenser Fan X-17
BlackDIODE