Isuzu 1999 RODEO Workshop Manual page 2153

General Description
The chassis electrical system is a 12–volt system with a
negative ground polarity.
Wire size are appropriate to respective circuits, and
classified by color. (The classification of harnesses by
color is shown on the circuit diagram for ease of harness
identification.)
The wire size is determined by load capacity and the
length of wire required.
The vehicle harness are: body harness, chassis harness,
engine room harness, instrument harness, transmission
harness, engine ECGI harness, dome light harness, door
harness, rear body harness, tailgate harness, SRS
harness and battery cables.
The harnesses are protected either by tape or corrugated
tube, depending on harness location.
The circuit for each system consists of the power source,
wire, fuse, relay, switch, load parts and ground, all of
which are shown on the circuit diagram.
In this section, each electrical device is classified by
system.
For major parts shown on the circuit based on the circuit
diagram for each system, a summary, diagnosis of
troubles and inspection procedures are detailed.
Notes for Working on Electrical Items
Disconnecting the Battery Cable
1. All switches should be in the "OFF" position.
2. Disconnect the battery ground cable (2).
3. Disconnect the battery positive cable (1).
CAUTION: It is important that the battery ground
cable be disconnected first. Disconnecting the
battery positive cable first can result in a short
circuit.
Connecting the Battery Cable
Follow the disconnecting procedure in the reverse order.
CAUTION: Clean the battery terminal and apply a
light coat of grease to prevent terminal corrosion.
Disconnecting the Connector
Some connectors have a tang lock to hold the connectors
together during vehicle operation.
Some tang locks are released by pulling them towards
you (1).
Other tang locks are released by pressing them forward
(2).
Determine which type of tang lock is on the connector
being handled.
Firmly grasp both sides (male and female) of the
connector.
Release the tang lock and carefully pull the two halves of
the connector apart.
Never pull on the wires to separate the connectors. This
will result in wire breakage as shown in the figure.
061RW002
WIRING SYSTEM
8D–3
D08RW128
D08RW129