Isuzu Trooper (1998-2002 year). Service manual — part 869
8D–10
WIRING SYSTEM
Symbols and Abbreviations
Symbols
Symbol
Meaning of Symbol
Fuse
Fusible link
Fusible link wire
Switch
Switch
Contact wiring
Battery
Diode
Electronic parts
Resistor
Speaker
Buzzer
Circuit breaker
Symbol
Meaning of Symbol
Bulb
Double filament bulb
Motor
Variable register
Rheostat
Coil (inductor), solenoid,
magnetic valve
Relay
Connector
Light emitting diode
Reed switch
Condenser
Horn
Vacuum switching valve
+
–
Switch
(Normal close type)
M
WIRING SYSTEM
8D–11
Abbreviation
Meaning of Abbreviation
A
ABS
ASM
AC
A/C
ACC
A/T
C/B
CSD
DIS
EBCM
ECGI
ECM
ECU
EFE
EGR
4A/T
4WD
FL
FRT
H/L
IC
IG
Ampere (S)
Anti-lock brake system
Assembly
Alternating current
Air conditioner
Accessories
Automatic transmission
Circuit breaker
Cold start device
Direct ignition system
Electronic brake control module
Electronic control gasoline injection
Engine control module
Electronic control unit
Early fuel evaporation
Exhaust gas recirculation
4-speed automatic transmission
Four-wheel drive
Fusible link
Front
Headlight
Integrated circuit
Ignition
Abbreviation
Meaning of Abbreviation
kW
LH
LWB
M/T
OD
OPT
PCM
QOS
RH
RR
SDM
SRS
ST
STD
SW
SWB
3A/T
V
VSV
W
WOT
W/
W/O
Kilowatt
Left hand
Long wheel base
Manual transmission
Over drive
Option
Powertrain control module
Quick on start
Right hand
Rear
Sensing and diagnostic module
Supplemental restraint system
Start
Standard
Switch
Short wheel base
3-speed automatic transmission
Volt
Vacuum switching valve
Watt (S)
Wide open throttle
With
Without
Abbreviations
8D–12
WIRING SYSTEM
Parts for Electrical Circuit
Wiring – Wire color
All wires have color–coded insulation.
Wires belonging to a system’s main harness will have a
single color (1). Wires belonging to a system’s subcircuits
will have a colored stripe (2). Striped wires use the
following code to show wire size and colors.
Example: 0.5 G / R
Red (Stripe color)
Green (Base color)
Wire size (0.5 mm
2
)
Wiring – Wire Color Coding
Abbreviations are used to indicate wire color within a circuit diagram.
Refer to the following table.
Color Coding
Meaning
Color Coding
Meaning
B
Black
BR
Brown
W
White
LG
Light green
R
Red
GR
Grey
G
Green
P
Pink
Y
Yellow
LB
Light blue
L
Blue
V
Violet
O
Orange
1
2
WIRING SYSTEM
8D–13
Wiring – Wire Size
The size of wire used in a circuit is determined by the
amount of current (amperage), the length of the circuit,
and the voltage drop allowed. The following wire size and
load capacity are specified. (Nominal size means
approximate cross sectional area (1).)
Wiring – Wire Size Table
Nominal size
Cross sectional
Outside diameter
Allowable
area (mm
2
)
(mm)
current (A)
0.3
0.372
1.5
9
0.5
0.563
1.7
12
0.85
0.885
1.9
16
1.25
1.287
2.2
21
2
2.091
2.7
28
3
3.296
3.6
37.5
5
5.227
4.4
53
8
7.952
5.5
67
15
13.36
7.0
75
20
20.61
8.2
97
1
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