diagram DATSUN B110 1973 Service User Guide

BODY

REAR
WINDOW
ELECTRIC

DEFROSTER

Option

J
Instrument
harness

Cooler
terminal

J

1
1
c
BW

Ignition
switch
I
lOA
@

hi

u

Heat
wire

glass
switch

T

Fig
BF
62

Wiring
diagram

The
rear
window

electric
defroster

glass
is
furnished
as

an

optional
equipment
It
is
semi

tempered
and
has

electric
heat
wires
baked
to
make
the
rear
window

glass

clear
under
adverse
weather
conditions
The
heat
wire

glass
switch
and

pilot
larnp
are

located
on
the
left
hand

side
of
the
instrument

as
shown
in

Figure
BF
64

Fig
BF
63

Heat

absorbing
rear

glass
Fig
HF
64
Location

of
heat
wire

glass
switch

and

pilot
lamp

3

Fig
BF
65
Front

floor
wiring

BF
33

BODY
ELECTRICAL

WIRING

CONTENTS

WIRING
HARNESS

Engine
compartment
harness

I
nstrument
harness
BE
1

BE
1

BE
2

WIRING

HARNESS

The

wiring
harness
is
classified
into

engine
compart

ment
harness
instrument
harness
and

body
harness
The

individual
harness

Jocating
positions
and

connecting

Position
e
w
the

individual

wiring
harnesses
are

indicated
a
f
Moreover
for
the

body
harness
the

installing
positioJ
differ

mutually
in

Sedan

Coupe

Station

wagon

and
yan

Engine

compartment
harness

Fig
BE
1

Engine
compartment
harness
1
Body
harness

WI
RING
DIAGRAM

INSPECTION
BE
2

BE
4

BE
6

A
0

Ij

7
9

Fig
BE
2

Engine
compartment
harness
2

Fig
BE

3

Engine
compartment
harness
3

BE
1

INSPECTION

Referring
to
the

wiring
diagram
check
the

wiring

harness

for
connection
with
electrical

equipment
and

connector
for
conned
ion
and
installation
When

checking

the

wiring
harness

note
the

following
matters

Connected
unit
should

not
be

loose
rusted
or

contaminated

2

Cable
insulator
cover
should
not
be

damaged
crack

ed
or

insulating
material

should
not
be
deteriorated

3
For
those

parts
which

are

grounded
through
the

installation

bolts
the
bolts
should
be
in
contact
with
the

body
completely
so
that

continuity
is

provided
in

between
the

body
and
bolts

4
Terminals

of
unit

through
which

current
flows

should
not
come

into
contact
with

other
metal

parts

5
No

erroneous
connection
should
be

present

DESCRIPTION

When
an
overcunent

exceeding
the
rated

amperage

flows
to
a
circuit
the

fuse
is
heated
and
melted
the

circuit
is

interrupted
and

thus
cables
and

electrical

equipment
are

protected
from

damaging
due
to

burning
or

damaging
is

limited
to
the

minimum
This
vehicle

is

equipped
with
six

fuses
and

one
fusible
link
The
fuses

are

located

in
the

fuse
box
and
used

to

protect
illumination

signal
and
other

systems
and
the
fusible
link
is

adopted

in
the
cable
between
the

battery
and
alternator
to

protect

the

charging
and

starting
circuits

FiJ
BE
16
Fuse
box
BODY

6
Cables
should
be

damped
so
that

they
do
not
come

into
contact
with

sharp
corner
or

part
lernperature
of

which

rises

highly

7
Cables
should
be

securely
clamped
in

posItions

sufficiently
separated
from

rotating
parts
such
as
fan

pulley
fan
belt

etc

8
Cables
should
be

provided
with
an

optimum
extra

length
at
sections

stationarity
on
the

body
or
at
sections

where
vibration

occurs
due
to

engine
operation
and

others

Note
a
When

inspecting
or

performing
other
mainte

nance

service
and
no

power
supply
is

required

particularly
or
when
it
is

anticipated
that
a

part

may
be
short
circuited
disconnect
the

battery
H

terminal

b
In
no
event
should
an
unloaded
circuit
be

directly
connected
with
ground
Be
sure
to
use
a

test

lamp
or
circuit

tester

fUSE

Fig
BE
17
Fusible
link

INSPECTION

In
the

most

cases
fuse
can
be

checked

visually

However
when

it
is
difficult
to

check

visually
a
circuit

tester

may
be
used

The
fusible
link
can

be

inspected

visually
or

by

feeling
on

finger

tip
However
the
fusible

link
can
be

inspected
more

correctly

by
using
a
circuit

tester

BE

6

BODY
ELECTRICAL

8

G

J

r

ICENSE
LAMPS
10
0
I
I

g
N
Ap
KING

10
00
01
2

I

NATION

J

J
r

j

a
iii

a

g

Lv

F
a
G

G

Lo
o
0

I
I

m

L

J

HER

UNIT
DIMMER

SWITCH
TURN

SIONAl

SWITCH

I
I

Fig
BE
28
Circuit

diagram
for
turn

signal
and
dimmer

switch

system

LIGHTING

SWITCH
HAZARD

WARNING
SWITCH

Removal
The
hazard

lamp
system
4

way
flasher
consists
of

hazard

warning
switch

and
flasher
unit
When
the

hazard

warning
switch
is
turned
on

all

signal
lamps
flash

simultaneously
telling
other
drivers
that
the
vehicle

is

stopped
When
the

turn

signal
lamps
flash
the

pilot
lamps

on
the
instrument

panel
also
flash

telling
you
of
hazard

lamp
operation
1
Rernove
the

connector
from

back
of
the

lighting

switch

2

Depressing
the

lighting
switch
knob

turn
it

counter

clockwise
and
remove
it

3

Loosen
the

escutcheon

switch
frorn
the
cluster
lid
and

remove
the

lighting

IGNITION
SWITCH

EZ

L
I

U
I

JJ

u

HAZARD
UNIT

Ip
FLASHER
UNIT

HAZARD
WARNING
SWITCH

161
6
6

g

Q

a
ll

Zll
Zll

CE
O
a

We
a
l
e

rY

1

LEFT
SiDE
RIGHT
SIDE

Fig
BE
29
Circuit

diagram
for
hazard

lamp
system

BE
11

BODY

PASSING
LIGHT

SWITCH

The

passing
light
switch
is

incorporated
in
the

grip
end

of
the
turn

signal
switch
lever
and
controls
the
head

lamp

main
beams
With
either
the

lighting
switch
turned
on
or
off
the
head

lamp
main
beams
will

light
while
the

switch

button
is

pushed
in

CB
FUSE

FUSE
P

T

FUSE

L

DI
TCH

ti

r
1

I

Y
fflf

0
00
0
2

ASSIHG

LICENSE
LAMPS

SWITCH
L

TAil
lAMPS

1
I

I
PASSING

LIGHT
RELAY

FRONT
PARKING

LAMPS
LIGHTING
SWITCH

1
NATlON

HEAD
lAMP

nt
OF

LEFT

sIDe
RIGtfT

SIDE

Fig
BE
30
Circuit

diagram
for

passing
light

system

TROUBLE
DIAGNOSES
AND

CORRECTIONS

Head

lamp

Probable
Me

thod
of

Condition

inspection
cause

All

lamps
do

not

light
Blown
off
fuse
or

faulty
contact
Check
the
fuse
block
and
white

cable
for
contact

Check
the
fuse
for

fusing
and

faulty
contact

Faulty
lighting
switch
terminal

connector
Check
the

connector
for
contact

Defective

lighting
switch
Conduct

continuity
test

The
head

lamp
Blown

off
fuse
or

faulty
contact

does
not

light

for
both

high

and
low
beams
Check
the

fuse
for

fusing
and

faulty
contact

Improper
dimmer
switch
contact
Check
the

connector
for
contact

Defective
dimmer
switch
Conduct
continuity
test

BE
12

r
Corrective

action

Repair
as

required

When

fused
detect

and

repair
the
cause

and

replace
the

fuse

Repair
as

required

If
the

ligh

ting
swi
tch

is
defective

replace

When
fused
detect

and

repair
the
cause

and

replace
the
fuse

Repair
as

required

I

f
the
dimmer
switch

is

defective

replace

9HORN
r
I

01

8ATTERY

HI

IGI

s

ILl

C
iORN
BODY

FUSE
H

S
HORN
BUTTON

BGI

J
H

B
S

Il

I
n6lm

I

L
J
L

HORN
RELAY

Fig
BE
3l
Circuit

diagram
for
hom

syrtem

HORN

Removal

Remove
the
connector
loosen
the

fixing
nut
in
the

horn
center
and

remove
the
horn

unit

Adjustment

1

Secure
the

horn
unit
in
a
vise

and
connect
cables
as

shown

in

Pigure
BE
32

AMMETER
110
to
15AI

Isw
f

@

113
I

VOLTMETER

I

15
to

20VI

BATTERY
HORN

Fig
BE
32
Circuit

for
ham

adjustment

2
Set
the

switch
to

ON
and
rnake
sure
that
the

voltmeter
indicates
12
to
12
5

V

3

Listening
the
horn
for
sound
level
volurne

and
tone

adjust
sound

properly
so

that
the
amrneter
indicates
the

rated

amperage
The

adjustment
is

made

by
turning
the

adjust
screw
after

loosening
the
lock
nut
Fig
BE
33

Adjusting
hom
IIOlume

Note
When
the

adjust
screw
is
turned

Clockwise

Counterclockwise
Current
increases

Current
decreases

4

When
a

proper
sound
is

obtained

through
the
above

adjustment
rnake
sure
that
the

proper
sound
can
be

obtained
at

voltage

generated
by
the
alternator
14
to

l5V

5
Lock
the

adjust
screw
with
the

lock
nut

Consumed
current

adjusting
value
A

Sound

Plat

type
Spiral
type

High
H
2
5
390
5

0
440

Low

L
2
5

330
5
0
350

Figures
encircled
in

parenthesis
are
basic

frequencies

Hz

BE

16

BODY

REGULATOR

FUSE
M

TEMPE

RATURE

GAUGE
IGNITION

SWITCH

Lf

I

iT
Ji
1M

THERMAL
TRANSMITTER
I

J

0

I
GAUGE
TANK
UNIT

FUEL
TANK

Fig
BE
38
Circuit

diagram
for
fuel
gauge
temperature
gauge
and

voltage

regulator

Replacement

Remove
the

cluster
lid
first

2
Unscrew
two

screws
and
remove
the

thermometer
or

fuel
meter

from
the

combination
meter

housing

3
Reinstall
a
new
meter
in

reverse

sequence
of
removal

Fig
BE
39

Removing
thermometer

OIL
PRESSURE
AND

IGNITION
WARNING
LAMPS

The

engine
lubricating

system
incorporates
an
oil
pressure

warning
lamp
which

glows
whenever

engine
oil

pressure
falls
below
0
4

kg
ern
to
0
6

kg
em
5
7
to
8
5

lb

sq
in

When
the

engine
is

stationary
the

light
glows
with
the

ignition
switch
turned
on
When
the

engine
is

running
and

the
oil

pressure
reaches
the

circuit
is
broken
and
the

light

goes
out

J

u

fj
Warning
lig

2
Fuse

bSM
Q

f

t

J

without

pressu
re
with

pressure

Fig
BE
40
Circuit

of
oil

pressure
warning
system

Ignition
warning
lamp
glows
when
the

ignition
switch

is
set
to
ON
and
the

engine
is
not

operated
or
when
the

generator
fails
to

charge
with
the

engine
operated

BE
20

BODY
ElECTRICAL

When
the

ignition
switch
is
set
to
ON
the

ignition

wa

rning
circuit
is

closed
and
current
flows
flows
from
the

ignition
switch
to
the

warning
lamp
bulb

and

ground

through
the

regulator
When
the

engine
is
started
and
the

generator
comes
into
operation
the

generator
output

current

opposes
the
current
flowing
from
the

warning

lamp
in

effect
it
breaks
the

warning
circuit

ground

connection
and
the

lamp
goes
out

l

r

hffi
u

z
Ignition
switch

I
Q
6

I
0

c

M
1
E

8

ca
i

L

g

PI
lot
c

P

I

j

co

rt
0

relay
E
0

5

y
y
1

N
N
3

Alternator

Regulator

Fig
BE

41
Circuit

of
ignition
warning
system

HAND
BRAKE
WARNING
LAMP

This

lamp
functions
both
hand
brake

warning
larnp
and

BULB
SPECIFICATIONS
service
brake
line

pressure
differential
warning
lamp

When
a

difference
between
front
and

rear
brake
line

pressures
reaches
the
rated

range
13
to
17

kgfcm2
185

to

242
lb

sq
in
the

ground
circuit
for
the

warning
lamp

is

closed
and
the

warning
lamp
lights

IGNITION
SWITCH

WARNING

LAMP

L
E

WARNING

SWITCH

1
SERVICE

BRAKE
LINE

PRESSU
R
E

DIFFERENTIAL

WARNING

J
SWITCH

Fig
BE

42
Circuit

diagram
for
brake

warning

system

tern
Specifications

Square

type
meter
Round

type
meter

Meter
illumination

larnp
VoW
12
3
4
2
12

1
7
3

Turn

signal
pilot
lamp
VoW
12
3
4
2
12
1
7
2

Head

lamp
main
high
beam

VoW
12
3
4

I
12

17
1

pilot
lamp

Ignition
warning
lamp
VoW
123
4

I
12
17
1

Oil

pressure
warning
lamp
VoW
12
3
4

1
12
1
7

1

Hand
brake

warning
lamp
VoW
12
1
7
1

for
U
S
A

CANADA

Clock
illumination

lamp
VoW
123
4
I
12
17
2

Figure
encircled
in

parentheses
indicates
number
of
bulbs
used

BE
21

The

lamp
does

not

go
out
when

the

engine
is

started
Faulty
charging
system
BODY

Inspect
the

charging

system

WINDSHIELD
WIPER
AND

WASHER

Description

Wiper
motor

replacement

Wiper
blade

operating
range
CONTENTS

BE
26

BE
27

BE
27

Description

The
windshield

wipers
consist

of

wiper
motor
link

mechanism

wiper
arms
and

blades
The

wiper
motor

unit

consists
of

a
motor
and
auto

stop
mechanism
The

wiper
rnotor
is

of
a
2
speed

type

When
the

wiper
switch
knob
is

pulled
to
the
I

st

step

the
windshield

wipers

operate
at

low

speed
and
when

pulled
to
the
2nd

step
operate
at

high
speed

The

wiper
motor
unit
is

located
on

the
cowl
dash
in

BATTERY

Cl

WIPER

MOTOR

rrQ

J
WASHER
MOTOR

IB

ILRI

L
CJ

LA

t
Y

I
Ll

j

IBI

1
f
I

LW

I
Wiper
washer
switch

replacement

Washer
nozzle

adjustment

TROUBLE

OIAGNOSES
ANO

CORRECTIONS
BE
27

BE
27

BE
28

the

engine

compartment
and
the

link
mechanism
is

located
behind
the

instrument

panel

The

electrically
operated
windshield
washer
consists
of

washing
fluid
lank

with

rnotor
and

pump
washer

nozzles

and

vinyl
tube
used

to

connect
those

compo

nents

The

windshield
washer

switch
is

combined
with

the

windshield

wiper
switch
to
a

single
unit

When

operating

the
washer

twist
the

switch
knob

IG

FUSE

W

v

l

i

f
WIPER
SWITCH

10FFI
I
2

I
TWIST

I

y

ILl

I

b

I

J
6

I
BLII

Fig
BE
43
Circuit

diagram
for
windshield

wiper
washer

system

BE

26

mechanism
is
installed
on
the

steering
jacket
tube
When

the

key
is
set
to

Lock

position
and

removed
the

steering
lock

spindle
is

inserted
in
a
notch
in

the
collar

which

is

stationarity
set
on
the

steering
shaft
to
lock
the

steering
wheel

The

ignitiun
switch

is
installed
on
the

back
of

key

cylinder
with
a

attaching
screw
and

interchangeable

tf
iY
t

7

a

1

Ignition
switch

part

2

Key
cylinder

part

3

Steering
jacket
tube

4
Lock
collar
5
Lock

pindle

6

Steering
shaft

7
Self

shear

type
screw

8

Attaching
screw

Fig
BE
50

Steering
lock

Key

position

Terminal
OFFor

GARAGE
Lock
ON

ST
ART

B

Battery

IG

Ignition

S
Starter

R
Resistance
b

1

Steering
lock

replacement

For
the

purpuse
of

tamper
proof
the
self
shear

type

screws
are

used
and
their

heads
are
sheared
off
when

installed
so
that

the

steering
lock

system
cannot
be

removed

easily
Replace
the

steering
lock

proper
in

accordance
with
the

following
instructions
when

required

Loosen

two

attaching
screws
and
break
the

remaining

twu
self
shear

type
screws
with

a
drill

or
other

proper

tool

Now
remove
the

steering
lock

proper
from
the
BODY

BE
30
steering
jacket
tube
When

installing
a
new

steering
lock

proper
be

sure
tu

tighten
two
new
self
shear

type
screws

to
shear

off
their

heads

Warning
switch
and

warnmg
buzzer

Fig
BE
51

Warning
switch

The
circuit
of
this

warning
system
is
closed

when
the

door
is

opened
with
the

steering
unlocked
because
the

door
switch
and

warning
switch

are
connected
in
series

When
the
cicuit
is
closed
the

buzzer
sounds

When

replacing
the

warning
switch
disconnect

two

cables
remove
the

cap
loosen
two

attaching
screws
and

remove
the

warning
switch

The

warning
buzzer
is
installed

on
the

back

left
side

of
the
instrument

panel
with

two

attaching
screws

FUSE
WARNING

SWITCH

WARN

BUZZ
G

n

WITCH

t

Fig
BE
52
Circuit

diagram
for

warning
system