NISSAN 300ZX 1984 Z31 Electrical System Workshop Manual

ELECTRICAL SYSTEM
I
SECTION EL
CONTENTS
HOW TO READ DIAGRAMS
STANDARDIZED RELAY
POWER SUPPLY ROUTING
BATTERY.
.. ..
STARTING SYSTEM .
STARTING SYSTEM -Starter -
CHARGING SYSTEM .
CHARGING SYSTEM - Alternator
COMB IN AT1 ON SWITCH
INSTRUMENT SWITCH
HEADLAMP
EXTERIOR LAMP,
INTERIOR LAMP
.
..
..
..
..
..
... ......
..
.. ....
..
.. ...
EL- 2
EL- 3
EL- 4
EL- 6
EL- 9
EL-
10
EL- 15
EL- 17
EL- 23
EL- 25
EL- 26
EL- 34
EL- 38
METER AND GAUGES - Digital Type Combination Meter . . EL- 41
METER AND GAUGES - Digital Type Combination Gauge . .. .. EL- 57
METER AND GAUGES - Needle Type Combination Meter .. . EL- 65
METER AND GAUGES
- Needle Type Combination Gauge.. .... EL- 68
WARNING LAMPS AND CHIME. .......... ... .... EL- 71
VOICE WARNING SYSTEM
... ... EL- 76
TIME CONTROL SYSTEM ... EL- 81
WIPER AND WASHER .... .... ... ... . EL- 89
HORN, CIGARETTE LIGHTER, CLOCK . . ......... EL- 92
REAR WINDOW DEFOGGER
... .. ... ....... EL- 93
AUDIO AND POWER ANTENNA
,. . .... .. . EL- 95
AUTOMATIC SPEED CONTROL DEVICE (AS
C D ) . ... , . EL- 97
LOCATION OF ELECTRICAL UNITS
... .. .. .. EL-104
HARNESS LAYOUT
. . .. .. .. . EL-107

HOW TO READ DIAGRAMS
I
POWER SUPPLY ROUTING
This diagram is helpful in identifying specific prob-
lems
in the power supply portion of the electrical
circuits. For example, let's say
a vehicle has an in-
operative
rear window defogger A quick check
proves that meter and
gauges in the vehicle are
operative The power supply diagram shows that
there cannot be
a problem between the battery,
ignition relay, ignition switch or fuse since the
power supply circuit for the
rear window defogger
Example
BRANCH M/T model
AlT model
n
@ M/Tmodel
@ AITmodel
t
ABBREVIATIONS
is common with the meter and gauges. Therefore,
the cause of this specific problem must
lie past the
fuse, such
as in the wiring, rear window defogger,
or ground.
WIRING DIAGRAM
This diagram identifies types and number of con-
nectors, electrical
terminal positions in the connec-
tor, color coding of wires, and connector codes
Refer to the following example
CONNECTOR This shows that there connectors are white 6 terminal pin-type connectors
Pin-type connector (Male)
(Female)
(Male)
(Female)
833 Piaan-type connector
gg Piatn-type connector
POWER This shows the tgni tion witch ~osition ~n which the system can be operated For deiailr, refer 10 POWER SUPPLY
A r
I
1 v SWITCH ., , ,-,. -..,m I This shows that conti-
u
f
L-
WIRE COLOR CODING
This number IS !dentical with the one of the HARNESS LAYOUT This show where the mnnenor
CarON I nutty exists between termmels @ and 0, when the switch 16 turned 10 ON rmition
B W R
BR =Brown = Black OR =Orange =White =Red P =Pink G =Green PU =Purple L =Blue GY =Gray Y =Yellow SB =Sky blue LG = Laghi Green
In case of color coding using a Stripe Bare Color IS given fmt. followed by the Stripe Color
Example LIW = Blue with White Stripe
EL-2

STANDARDIZED RELAY
1T
1M
2M
1M 1E
-
Outer view Circuit
I1
00
Symbols Case color
BLACK
BLUE
BROWN
GRAY
d .b
SEL639D
EL-3

~ POWER SUPPLY ROUTING
Wiring
Diagram
FUSIBLE LINK BOX 8ATTERY BR
-
STARTING
Charging system
rc- I
-Power wmdow
EL-4

POWER SUPPLY ROUTING
Fuse Fusible Link
_I
Check
SEL276
a
b
c d
If fuse is blown, be sure to eliminate cause of
problem before installing new fuse
Use fuse of specified rating. Never use fuse of
more than specified rating
Do not install fuse in oblique direction, always
insert
it into fuse holder properly
Remove fuse for clock if vehicle
is not used for
a long period of time.
A melted fusible link can be detected either by
visual inspection or by feeling with finger tip If its
condition is questionable, use circuit tester or test
lamp
CAUTION
a If fusible link should melt, it is possible that
critical circuit (power supply or large current
carrying circuit)
is shorted In such a case, care-
fully check and eliminate cause
of problem
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
b
EL-5

BATTERY
CHECKING SPECIFIC GRAVITY
1 Read hydrometer and thermal gauge indica-
tions
as eye level.
Read top level with scale.
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.
2. Convert into specific gravity at 20°C (68°F)
Example
e When electrolyte temperature is 35°C (95°F)
and specific gravity of electolyte is 1230,
converted specific gravity
at 20°C (68°F) is
Check
- Hydrometer 1 240
When electrolyte temperature
is 0°C (32°F)
and specific gravity of electrolyte
is 1.210,
converted specific gravity
at 20°C (68°F) is
1.196.
Converted specific gravity (S, 1
1
1 , I I I I I 1- I -30 -20 -10 0 10 20 30 40 50 1-221 1-41 1141 132) 1501 1681 (86) (104) (1221
SELCdZD Electrol) te temperature "C ('F)
EL-6

BATTERY
Full charging specific
gravity at 20°C
(68°F)
Check (Cont’d)
Converted specific
gravity at 20°C
(68°F)
1 26 I 120
I Recharging necessary I
BATTERY CAPACITY TEST
1 With battery connected to tester as shown,
turn load knob until
a draw of 3 times the
battery rating
is shown (Example Battery
rating
60AH Turn load to 180A draw )
Hold this draw for 15 seconds, then look at
voltage If voltage remains at 96 volts or
above,
THE BATTERY IS GOOD If voltage
drops below
96 volts, then proceed to next
test
2
THREE-MINUTE CHARGE TEST
1 Connect battery charger
2
3
Turn charger to a fast rate not over 40A
After three minutes, check voltmeter reading
If it is over 16 5 volts battery should be re-
placed
EL-7

BATTERY
CHARGING RATE AND SPECIFIC GRAVITY
OF BATTERY ELECTROLYTE
The relationship between the charged condition
of the battery and the specific gravity of battery
electrolyte differs,
as shown in figures below,
when the battery
is discharging and when it IS
being charged
Charging battery at a curreni 1/10 battery capacity
100 80 60 40 20 0
Charged rare (I" %J SEL8088
Chargtng battery at a curreni 116 of battery capacity
100 80 60 40 20 0
Charged rate (In %) SEL809B
As can be seen from these figures, the battery has
the following features
The specific gravity of battery electrolyte
increases very slowly while the battery is being
charged
The smaller the charging current, the slower
the specific gravity of the electrolyte increases
ling
WARNING:
a. Keep battery away from open flame while
it is being charged
b When connecting charger, connect leads
first, then
turn on charger. Do not turn on
charger first, as this may cause a spark.
c. Do not allow electrolyte temperature to go
over45"C (113°F).
CHARGING CURRENT AND TIME
REQUIRED
FOR CHARGING
Charge the battery at 1/10 the current of battery
capacity
Charging current I Time required
1/10 of battery capacity I Approx 8 - 10 hours
116 of battery capacity
(But not more than 10-ampere) Approx 4 - 5 hours ~~
~
CAUTION:
Do
not use more than 10-ampere current flow to
charge the battery quickly, as
this will shorten the
battery's service life.
-Service Data and Specifications -
Applied model Canada .
Ma,ntenance-free
Capacity V-AH I 1x0 j 12-70
1 126 I 128 Full charging specific gravi~y
at 2O'C 168°F)
EL-8

STARTING SYSTEM
Wiring Diagram
MIT MODELS FUSIBLE LINK BOX
THEFT WARNING
RELAY 2
IGNITION
SWITCH
-1
- STARTER MOTOR
AIT MODELS
lNHlBlTOR SWITCH
BATTERY
THEFT
WARNING
RELAY9 INHIBITOR
RELAY .W
FUSIBLE LINK BOX
EL-9

STARTING SYSTEM -Starter-
Construction
S114-3748
SEL623D
EL-I 0