fuse box DATSUN PICK-UP 1977 Service Manual

MEASUREMENT

OF
REGULATOR

VOLTAGE

Regulator
voltage
is
measured
with

regulator
assembled
with
alternator

When

measuring
voltage
with

regulator

mounted
on

car
it
is

necessary
to

rotate

engine
at

high
speed

Connect
DC
voltmeter

l5
30Y

DC

ammeter

l5
30A

battery
and
a

O

25fl

resistor
rated

at
25W
with

cables

as
shown

I

Check
to
be
sure
that
all
electrical

loads
such
as

lamps
air

conditioner

radio
etc
are
turned
off

2

Before

starting
engine
be
sure
to

make
short
circuit
with
a

cable
be

tween
fuse
side
terminal
of
resistor

O
25fl

and

negative
side
terminal
of

ammeter
Failure
to
follow

this

pre

caution

will

cause
needle
of
ammeter

to

swing

violently
resulting
in
a
dam

aged
ammeter
Engine
Electrical

System

Genera

tor

A

r

iJ

IG

Fuse
box

i
B
Rqulator

Connector

Wire
harness

Short
circuit
here
between

fuse
side

tenninal
and

terminal
of
ammeter

before

starting
the
operation

Ammeter

lOA
V

Voltmeter
30V

EE055

Fig
EE
48

Measuring
regulator
voltage
with

regulator
on
vehicle

3
Refer
to
the

following
chart
to

determine
if

regulator
and
relative

EE
21
parts
are
in

good
condition

Fuse

M
Body
Electrical

System

YR
Meter

voltage
regulator

Water

temperature
gauge

BE261

Circuit

diagram
of
fuel
gauge
and
water

temperature
gauge

pressure
falls
below
0
4

to
0
6

kg
cm2

5

7
to
8
5

psi
Under
normal

opera

tion
when
the

engine
is

stationary
the

ligh
glows
with
the

ignition
switch

turned

on
When
the

e

gine
is

running

and
oil

pressure
reaches
the

above

range
the
circuit

opens
and
the

light

goes
out
Ignition

switch
YW

B

1

Y

I
Fusible

link

YW

t

Thermal
transmitter
L

Fig
BE

25

OIL
PRESSURE

WARNING
LAMP

DESCRIPTION

The

engine
lubricating
system
in

corporates
an
oil

pressure

warning

lamp
which

glows
whenever

engine
oil

FUSE
BOX

SA

IGJ
G
YR

I

G

IGNITION

SWITCH

YB

I
FUSIBLE
LINK

O
J
BROWN
lffi

l

f

r@

Fuel

gauge

Fuel
tank

TO
METER
VOLTAGE
REGULATOR

TO
OTHER
WARNING

lAMPS

jt

Oil

PRESSURE

WARNING
LAhlP

YB

tl

PRESSURE

PRESSURE
FROM

BATTERY

BE263

Fig
BE

26
Circuit

of
oil

prelSure
warning
system

Fusible
link
Fuse
box

M
OIL
PRESSURE
SWITCH

To

replace
oil

pressure
switch

dis

connect

lead
wire
from
switch
termi

nal
and
unscrew
switch
from

engine

cylinder
block

Prior
to

installing
switch
to

cylinder

block
be

sure
to

apply
conductive

sealer
to
threads
of
new

switch

CHARGE
WARNING

LAMP

DESCRIPTION

The

charge
warning
lamp
glows

when
the

ignition
switch
is
set
to

ON
with
the

engine
shut
down

or

when
the

generator
falls
to

charge
with

the

engine
operated

When
the

ignition
switch
is

set
to

ON
the

charge
warning
circuit
is

closed
and
current
flows
from
the

ignition
switch
to
the

warning
lamp

and

grounds
through
the

regulator

Fig
BE
27

1
When
the

engine
is

started
and
the

generator
comes
into

operation
the

generator
output
cur

rent
N

opposes
th
current

flowing

from
the

warning
lamp
as
the
current

N
increases
the
solenoid
is
more

energized
and
the

pilot
lamp
relay

contacts
are

open
in
effect
it
oreaks

the

warning
circuit

ground
connection

and
the

lamp

goes
out
Fig
BE
27

2

Fusible
link
Fuse

box

M

From

battery

To

battery
Ig
ition

ru
nu
swllch

A
A
To

other

warning

h
To

ignition

IQlamps

i
J

r
coil
WR

t

I

j
Charge
warning
lamp

T

T

I
War

lamp
relay

J
I

Generator
v

it
ge
e

g
bt
From

battery

To

battery
Ignition

witch

J
i

L
r
t
ft
ignition

r

Glj
fCOil
WR

f

I
Warning
lamp
relay

Generator

Voltage
regulator
I
YR

Fig
BE
27
1

BE17
YR

UTO
other

warrung

lamps

Charge

warning
lamp

BE264

Fig
BE
27
2

Circuit

of
charge
warning
system

Body
Electrical

System

tive
terminal
or
B

terminal
and
blue

red
wire
terminal
in

wiring
connector

plug

3
To
check

wiper
low

speed
opera

tion
connect
L
terminal
to

ground

with

ground
cable
or
connect
L
termi

nal
to
black
wire
terminal
make
sure

that

wipers
sweep
at
low

speed

4
To
check

wiper

high
speed
opera

tion
connect

ground
cable
to
H
termi

nal
in
the

same
manner
as
in

step
3

make
sure
that

wipers

sweep
fast

5

During
low

speed
operation
con

nect
E
terminal
to

ground
and

conl
ect

P
and
L
terminals
with
lead
wire

as

shown
in

Figure
BE

38
At
this
time

make
sure
that
auto

stop
mechanism

actuates
to

stop
wiper
blade
at
the

specified
position

6

Wiper
is
in

good
condition
if

above
tests
are
made
as

indicated
H
tenninal
Blue
white

o

@

C

BE864A

Fig
BE

38

Wipftrmotor

rt
Cl

Battery
Fusible
link

e
Ignition
witch
Wiper
and
washer

switch

I

D
j
Fuse

box

Y
O
Continuity
test

Remove

wiper
switch
from
vehicle

as
outlined
in

Wiper
Switch

Test

continuity
through
wiper

switch

by

using
test

lamp
or
ohm

meter
WQ5hcr
motor

Wiper
motor

191
LR

y

I
L

I
w

J
Wiper
switch

B

terminal

P
tenninal

L
terminal

E
terminal

H
t
rmjrW

r
21
1

b
I

r
1

I

I

BE865A

Fig
BE

39
Circuit

diagram
of
windshield

wiper
wtUher

sy
te7tl

TERMINAL
I
SlOIT01

POSIl10N

I

I
OFF

2

1
1
2

I

b

ii
4

5

Switch

position

2

I

Z

m
Z
I
I

I
I
I

I
I
10
I
3
2

BE686B

Fig
BE
40
Wi
r

witch

8E

24

Inspection

Check

continuiry
in
fan
switch

circuit
with
a
test
lamp
or

an
ohm

meter

I

011
I
2
3

ICD

Tt

tt

AC772

Fig
AC
45
Fan
switch

RESISTOR
FOR
FAN
SWITCH

Removal
and
Installation

I

Disconnect
battery

ground
cable

2
Remove

glove
box

3
Remove

cooling
unit
Refer
to

Removal
and
Installation
under

Cooling
Unit

4

Disconnect
resistor
lead
wires
at

connector

@

O
sn
I
3n

CD
00
@

AC492

Fig
AC

46
Resistor

for
fan
switch
Air

Conditioning

5

Remove
resistor

assembly
from

upper
side
of

cooling
unit

Resistor
is

inserted
into

case

6
To
install

res
istor
for
fan
switch

reverse
the

order
of
removaL

Inspection

Test

continuity
between
resistor

and
fuse

THERMO
SWITCH

Removal
and
installation

1
Disconnect

battery

ground
cable

2

Remove

glove
box

3
Remove

duct
from

cooling
unit

4

Disconnect
thermo
switch
control

cable
and
lead
wires

5

Remove
thermo
switch

Note

Capillary
lube
is
fitted
into

groove
in
cooler
unit

6
To

install
thermo
switch
reverse

the

order
of
removal

I

I

AC773

Fig
AC
47

Removing
thermo
switch

AC

32
Inspection

I

Fully
move
thermo
swirch
lever

to
COLD

2

Test

continuity
between

ter

minals
with
a
test

tamp
or

an
ohm

meter

Continuity
should
exist

3

Dip
capillary
tube
end

into
ice

water
Test
continuity
between
ter

minals

Continuity
should
not
exist

4

Replace
if
switch
is

found
dam

aged

F
I
C
D
SOLENOID
VALVE

Removal
and
installation

I

Disconnect
battery
ground
cable

2
Disconnect
lead
wires
and
vacu

um

tube

3

Remove
two
screws
securing
sole

noid

valve
and
remove
solenoid
valve

AC77
4

Fig
AC

48
Removing
F
l
C
D

solenoid
valve

4
To
install
solenoid
valve
reverse

the
order
of
removal

Inspection

1
Test

continuity
in
solenoid
valve

circuit
with

a
test

lamp
or
an
ohm

meter

2
Turn
both
fan
switch
and
thermo

switch
on

3
Run

engine
at
idle
and
check
to

be
sure
that
vacuum
is

present
in
line

between
solenoid
valve
and

diaphragm