Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan 300ZX 1984-1985,1988,1990,1994-1996 Approved 1988 Electrical

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ELECTRICAL SYSTEM
I

SECTION EL
When you read wiring diagrams:
0 Read GI section. "HOW TO READ WIRING D I A G R A M S.
-
CONTENTS
HARNESS CONNECTOR .................................................. EL- 2
STANDARDIZED RELAY ................................................. EL- 3
POWER SUPPLY ROUTING ................................................ EL- 5
BATTERY .............................................................. EL- 9
STARTING SYSTEM ..................................................... EL- 17
STARTING SYSTEM . Starter. ........................................... EL- 18
CHARGING SYSTEM ..................................................... EL- 23
CHARGING SYSTEM -Alternator ......................................... EL- 26
COMBINATION SWITCH .................................................. EL- 32
INSTRUMENT SWITCH ................................................... EL- 34
HEADLAMP ............................................................ EL- 35
EXTERIOR LAMP ....................................................... EL- 54
INTERIOR LAMP ........................................................ EL- 59
METER AND GAUGES . Digital Type Combination Meter ...................... EL- 65
METER AND GAUGES .Needle Type Combination Meter ...................... EL- 83
METER AND GAUGES .Needle Type Combination Gauge ...................... EL- 86
WARNING LAMPS AND CHIME ........................................... EL- 90
TIME CONTROL SYSTEM ................................................ EL- 98
WIPER AND WASHER ................................................... EL-107
HORN, CIGARETTE LIGHTER, CLOCK .................................... EL-111
REAR WINDOW DEFOGGER .............................................. EL-112
AUDIO AND POWER ANTENNA .......................................... EL-115
AUTOMATIC SPEED CONTROL DEVICE (A.S.C.D.) .......................... EL-118
STEERING WHEEL SWITCH SYSTEM ...................................... EL-126
THEFT WARNING SYSTEM ............................................... EL-146
LOCATION OF
ELECTRICAL UNITS ....................................... EL-177
HARNESS LAYOUT ..................................................... EL-180
SPECIAL SERVICE TOOLS ............................................... EL-195
WIRING DIAGRAM REFERENCE CHART
E.C.C.S. ....................
LOCK-UP CONTROL SYSTEM ...... AT SECTION MIRROR ..................... W SECTION
ADJUSTABLE SHOCK ABSORBER ... FASECTION HEATER AND AIR CONDITIONER ..... HA SECTION
HARNESSCONNECTOR
Description

HARNESS CONNECTOR
0 All harness connectors are designed so that they do not become loose or disconnected accidentally.
0 The connector can be disconnected by pushing or lifting the locking section.
CAUTION:
Do not pull the harness when disconnecting the connector.

[Example]

PUSH
Terminal retainer

IWaterprmf type)

Terminal retainer

LIFT PUSH

PUSH

PUSH
PUSH

PUSH
IFw combinntion man)

SE L769 D

EL-2
STANDARDIZED RELAY
Normal Open, Normal Closed and Mixed Type Relays
Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.
~

NORMAL OPEN RELAY NORMAL CLOSED RELAY M I X E D TYPE RELAY

Flom

0 0 0 s not
Does not
flow
0-

SW1

- Flows
BATTERY SW1
J
BATTERY

ooer not
0

& 2
Oms not flow
~

flow

sw 1
n

BATTERY
3 SW1

Type of Standardized Rela
BATTERY

'S
SWl BATTERY

SEL88lH

1M .......... 1 Make 2M .......... 2 Make
1T .......... 1 Transfer 1M.lB .......... 1 Make 1 Break

1M 2M

11 1M.16

SEL882H

EL-3
~

STANDARDIZED RELAY

Outer view Circuit Connector symbol
and connection

I 5 4

b BLACK

2 3

BLUE

BROWN

GRAY

0' b
SEL883H

EL-4
POWER SUPPLY ROUTING
Wiring Diagram

TURBO MODELS

SEL473K

EL-5
POWER SUPPLY ROUTING
Wiring Diagram (Cont'd)

NON-TURBO MODELS

FUSIBLE LINK BOX
BATrERV

E C C S wstem

STARTING

ItNlTlON
RELAY CIRCUIT
BREAKER

@ BODYGROUND

@ : GL and GLL models

SEL474K

EL-6
POWER SUPPLY ROUTING
Fuse Fusible Link

A melted fusible link can be detected either b y
visual inspection or by feeling with finger tip. If i t s
condition is questionable, use circuit tester or test
lamp.

Check

SEL276

a. If fuse is blown, be sure to eliminate cause of
problem before installing new fuse.
b. Use fuse of specified rating. Never use fuse of
more than specified rating.
c. Do not install fuse in oblique direction; always CAUTION:
insert it into fuse holder properly. a. If fusible link should melt, it is possible that
d. Remove fuse for clock if vehicle is not used for critical circuit (power supply or large current
a long period of time. carrying circuit) is shorted. I n such a case, care-
fully check and eliminate cause of problem.
b. Never wrap periphery of fusible link with vinyl
tape. Extreme care should be taken with this
link to ensure that it does not come into con-
tact with any other wiring harness or vinyl or
rubber parts.

EL-7
POWER SUPPLY ROUTING
~~

Note:

EL-8
BATTERY

CAUTION:
a. If it becomes necessary to start the engine with a booster battery and jumper cables, use a
12-volt booster battery.
b. After connecting battery cables, ensure that they are tightly clamped to battery terminals for good
contact.
c. Never add distilled water through the hole used to check specific gravity.

How to Ha Ile Battery
METHODS OF PREVENTING OVER- Check the charge condition of the battery.
DISCHARGE ~ Hydrometer

The following precautions must be taken to pre-
vent over-discharging a battery.
The battery surface (particularly its top)
should always be kept clean and dry.

Keep clean and dry

Periodically check the specific gravity of the
electrolyte. Keep a close check on charge
condition to prevent over-discharge.

CHECK I NG ELECTROLYTE LEV EL

If the top surface of a battery is wet with elec- WARNING:
trolyte or water, leakage current will cause the Do not allow battery fluid to come in contact with
battery to discharge. Always keep the battery skin, eyes, fabrics, or painted surfaces. After
clean and dry. touching a battery, do not touch or rub your eyes
When the vehicle is not going to be used over a until you have thoroughly washed your hands. If
long period of time, disconnect the negative the acid contacts the eyes, skin o clothing, imme-
r
battery terminal. diately flush with water for 15 minutes and seek
medical attention.
7 Remove negative
terminal. Normally the battery does not require additional
water. However, when the battery is used under
Severe conditions, adding distilled water may be
necessary during the battery life.

EL-9
~

BATTERY
How to Hand11 attery (Cont'd)

0 I f the electrolyte level is low, remove cell plug SULPHATION
using a suitable tool. When a battery has been left unattended for a long
Add distilled water up to the MAX level. period of time and has a specific gravity of less
than 1.100. it will be completely discharged, result-
ing in sulphation on the cell plates.
Compared with a battery discharged under normal
conditions, the current flow in a "sulphated" bat-
tery is not as smooth although i t s voltage is high
during the initial stage of charging, as shown in the
following figure.
- Normal battery
______ Subhated battery
Chargmg voltage
A I-.
'.
--___
+
Charging voltage
I---
SELOOIK

Charging current

1 Chargingcurrent

-
Duration of charge SEL709E

EL-I0
BATTERY
Specific Gravity Check

SPECIFIC GRAVITY CHECK
Hvdrometer
1. Read hydrometer and thermometer indications
at eye level.
Read top level with scale.

I
~ Hydrometer
Thermometer

U
Thermometer

SEL710E

2. Convert into specific gravity at 20

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