Isuzu N-Series. Manual - part 975

CAB AND CHASSIS ELECTRICAL 8-5

Connector Pin Insertion

1. Check that the tang lock is fully up.
2. Insert the pin from the connector wire side.

Push the pin in until the tang lock closes firmly.

3. Gently pull on the wires to make sure that the con-

nector pin is firmly set in place.

Parts Handling
Be careful when handling electrical parts. They should
not be dropped or thrown, because short circuit or other
damage may result.

Cable Harness
When installing the parts, be careful not to pinch or
wedge the wiring harness.
All electrical connections must be kept clean and tight.

Use a grommet or guard tube to protect the wiring har-
ness from contacting a sharp edge or surface.

N8A0011E

N8A0012E

N8A0013E

N8A0014E

8-6 CAB AND CHASSIS ELECTRICAL

Position the wiring harness with a enough clearance
from the other parts and guard the wiring harness with a
vinyl tube and clips to avoid direct contact.

The wiring harness between engine and chassis should
be long enough to prevent chafing or damage due to
various vibrations.

Splicing Wire

1. Open the Harness

If the harness is taped, remove the tape. To avoid
wire insulation damage, use a sewing “seam rip-
per” (available from sewing supply stores) to cut
open the harness.
If the harness has a block plastic conduit, simply
pull out the desired wire.

2. Cut the wire

Begin by cutting as little wire off the harness as
possible. You may need the extra length of wire lat-
er if you decide to cut more wire off to change the
location of a splice. You may have to adjust splice
locations to make certain that each splice is at least

1-2/2

″ (40 mm) away from other splices, harness

branches, or connectors.

3. Strip the insulation

When replacing a wire, use a wire of the same size
as the original wire. Check the stripped wire for
nicks or cut stands. If the wire is damaged, repeat
the procedure on a new section of wire. The two
stripped wire ends should be equal in length.

4. Crimp the Wires

Select the proper clip to secure the splice. To de-
termine the proper clip size for the wire being
spliced, follow the directions included with your
clips.
Select the correct anvil on the crimper. (On most
crimpers your choice is limited to either a small or
large anvil.) Overlap the two stripped wire ends
and hold them between your thumb and forefinger.
Then, center the splice clip under the stripped
wires and hold it in place.

• Open the crimping tool to its full width and rest

one handle on a firm flat surface.

• Center the back of the splice clip on the proper

anvil and close the crimping tool to the point
where the back of the splice clip touches the
wings of the clip.

• Make sure that the clip and wires are still in the

correct position. Then, apply steady pressure
until the crimping tool closes.

N8A0015E

N8A0016E

N8A0017E

CAB AND CHASSIS ELECTRICAL 8-7

Before crimping the ends of the clip, be sure that:

• The wires extend beyond the clip in each direc-

tion.

• No strands of wire are cut loose, and
• No insulation is caught under the clip.

Crimp the splice again, once on each end. Do not
let the crimping tool extend beyond the edge of the
clip or you may damage or nick the wires.

5. Solder

Apply 60/40 rosin core solder to the opening in the
back of the clip. Follow the manufacturer's instruc-
tions for the solder equipment you are using.

6. Tape the Splice

Center and roll the splicing tape. The tape should
cover the entire splice. Roll on enough tape to du-
plicate the thickness of the insulation on the exist-
ing wires. Do not flag the tape. Flagged tape may
not provide enough insulation, and the flagged
ends will tangle with the other wires in the harness.

N8A0018E

N8A0019E

N8A0020E

N8A0021E

8-8 CAB AND CHASSIS ELECTRICAL

If the wire does not belong in a conduit or other har-
ness covering, tape the wire again. Use a winding
motion to cover the first piece of tape.

Symbols and Abbreviations

Symbols

Symbol

Meaning of Symbol

Fuse

Fusible link

Fusible link wire

Switch

N8A0022E

N8A5501E

N8A5502E

N8A5503E

N8A5504E

Switch

Switch
(Normal close type)

Contact wiring

Battery

Diode

Electronic Parts

Resistor

Symbol

Meaning of Symbol

N8A5505E

N8A5506E

N8A5507E

N8A5508E

N8A5509E

N8A5510E

N8A5511E