1977 DATSUN PICK-UP relay

Floor
temparature
warning

lamp

Refer

to

Figure
EC
74

for
the

loca

tion
of
this

part

L

1t

1

RAt

Fig
EC
74
Location
of
floor

temperature
warning
lamp

INSTALLATION

To
install
reverse
the
order
of

rem
ovaL

INSPECTION

Floor
warning
temperature

system

Apply
parking
brake
Shift

gears

into
Neutral
foI
manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1
Ensure
that
floor

temperature

warning

lamp
lights
when

ignition

switch
is
iumed

to
the
S

position

If

not
check

lamp
for
burned

bulbs

Replace
bulb
if
bulb
is
burned
out

If

bulb
is

not
burned
trace
wire
s

back
to

ignition
switch

Repair
or

replace
if

necessary

2
Be

sure
that
floor

temperature
is

cool
below
800C

1760Fj
before

carrying
out
the

following
procedure

I
Remove
rearseat

2

Ignition
switch
is

turned
to
the

IG

position

3
Ensure
that
floor

temperature

warning
lamp
goes
out

4
Heat

surrounding
areas
of
floor

temperature
sensing
switch
with
a

proper
heater
to
ensure
that
floor

temperature
warning
lamp
glows
when

floor
is
heated

to
the

specifications
as

shown
in
the
table
below
Emission
Control

System

Temperature

sensing
switch

Contact
close
Temperature

warning
lamp

Off

Contact
open
On

Note

Avoid

heating
floor

tempera

ture

sensing
switch

directly

If

lamp
does

not
glow
check
floor

temperature
sensing
switch
connector

for

continuity
with

a
circuit
tester

If

continuity
should
exist
after

heated

surrounding
areas
of
floor
tem

perature
sensing
switch

replace
tem

perature
sensing
switch

If
con

tinuity
does

not
exist

trace

the

wiring
back
to

relay
or
check
the

following
step
3

Repair
or

replace

wire
s
if

necessary

Note
The

floor

temperature
sensing

switch

may
be
heated

through
the

floor

by
a

proper
heater

3
Turn

ignition
switch
to
the

IG

position
and
disconnect
floor

temper

ature

sensing
connector
The

lamp

should
remain

on
If

not
check
floor

temperature
relay
for

continuity
with

2
00

r
I

141

J

To
floor

temperatwe

warning
lamp

2
From

S

position

3
From

IG

position

4

From

ignition
switch

5
To
floor

temperature

sensing
switch
O

When
floor

temperature

warning
lamp
lights

Check
floor

temperature
warning

lamp

1

Open
or

shorj
circuit
in

wiring

harness

2

Check
fuel

system
with

regard
to

the

following
items

Refer
to

Inspec

lion
of
Fuel

System

EC
29
Floor

temperature

Below
1050C
221
OF

Above

1050C
221
OF

a
circuit

tester

Referring
to
the

following
floor

temperature
relay
if

relay
is
normal

trace
wire
s

back
to

ignition
switch

Repair
faulty
wiring

Floor

temperature
relay

When

checking
floor

temperature

relay
for
unit

remove
it
and

proceed

as
follows

1

Check
for

continuity
between

@

and

ID
Continuity
should
exist

Check
for

continuity
between

CD

and@
Continuity
should
exist

Check
for

continuity
between

CD

and

@
Continuity
should
not

exist

2

Apply
a
12

volt
doc
across

@
and

ID
to

ensure
that

continuity
exists

between

CD
and

@
and
that

con
ti

nuity
does

not
between

CD
and

@
If

test
results
dn

not

satisfy
the
above

replace
the

floor

temperature
relay

EC344

Fig
EC
75

Checking
floor
temperature
relay

1
Float
level

2
Choke

3

Normal
fuel

supply
system
Prima

ry
and

secondary

4
Accelerator

pump

5
Power
valve

6
B
C
D
D

7
Fuel
strainer

8
Air
cleaner

fB
WBBYBY
B

@@@@

I
I

FUSIBLE
lIN

r
T

H

BATTERY
rJ

BATTERY

f

EARTH
POINT

f

I
I
I

@@@

Y

BY

BWWB

@@@

I

I
I

AfT
E

quipped
with

cooler

COLOR
CODE

B
Black

OW
Black
with

white

stripe

BY
Black
with

yellow

stripe

W
White

WB
White

with
black

stripe
Engine
Electrical

System

FUSIBLE
LINK

1Y
O
b
INHIBITOR
RELAY

INHIBITOR
SWITCH

A

I
J
Y

@

I

A

l

rBW

j

CJ

B
W
BWI
000

000

ggg
For

California

I

Bd

f
00

00

00

00

Q

BW

B

Y

BY
WB

BY

@
@
@

BW

@

I
M
T

Equipped
with
cooler
@
I

@

BY

BY

@

I
STARTING

MOTOR

l
BY

BW

9

IGNITION
SWITCH

L

INHIBITOR
SWITCH
STARTER

MOTOR
Notes

a

@
M
T
only

@
A
T

only

b
Inhibitor
switch
is

on

in
neutral

EE
5
Fig
EE
6
Circuit

diagram
0

starting
systom
eE491

DESCRIPTION

MEASUREMENT
OF
REGULATOR

VOLTAGE

ADJUSTMENT

VOLTAGE
REGULATOR

DESCRIPTION

The

regulator
consists

basically
of

a

voltage
regulator
and
a

charge

relay

The
voltage

regulator
has
two
sets
of

contact

points
a
lower
set

and
an

upper
set
to
control
alternator
volt

age
An
armature

plate
placed
between

the
two
sets
of
contacts
moves

upward

or
downward
or
vibrates
The
lower

contacts
when
closed

complete
the

jCV
ID@
@

GJ
I

@

@

@
Engine
Electrical

System

REGULATOR

CONTENTS

EE
20
CHARGING
RELAY

SERVICE

DATA
AND

SPECIFICATIONS

TROUBLE
DIAGNOSES
AND

CORRECTIONS

Including
alternatorl

EE
25
EE
23

EE
24

EE

20

EE

23

EE
23

field
circuit
direct
to

ground
and
the

upper
contacts
when
closed

complete

the
field

circuit
to
ground

through
a

resistance
field
coil
and

produce

alternator

output

The

charge
relay
i
similar
in

construction

to
the

voltage
regulator

When
the

upper
contacts
are
closed

charge
warning
lamp
goes
on
v

1

Charge
relay

2

Voltage
regulator

EE285

Fig
EE
46
View

of
removing
cover

As

regards
the
construction
the

voltage
regulator
is

very
similar
to
the

charge
relay
as
shown
in

Figure
EE47

@

r

J
CD

@

@

@
Q
@
ID@

ID@

J
t

L

T

@
r

b
r
CD

L
@

j
1

g

f

@

@
EEJ97

J
I1Jlccting
spring

2
Y
kt

g
p

3
Armaturc

4
Core

go

5
Low

Sllccd
lnlacl

h
Point

ap

7

High
speed
conlat
t

8
Contact
c
9

3111111
0
118
ill

di

10

41l1I11W
157in
c1ia
few

II

Cuil

12

lock
nut

J3

Adjllslin
screw

14

Adjll
sting
sprin

15
Yoke
9

Adjusting
screw

10
Lock

nut

11
Coil

12
4mm

0
157
in

dia
screw

13
3mm
0
118
in

dla
crew

14
Contact

iet

15

Voltage

cgulatm
contact

a

Cnl1
Tlll
tion
f

lltagl
l

j
llIOltllT
I
Point

gilp

2

Charge
relay
contllct

3
Core

gap

4

ArlllatlJre

5

Connecting

sprin

6
Yoke

gap

7
Yoh

B

Adjusting
pring

b

Construction
of

charge
relay

Fig
EE
47
Structural
vi
w

EE
20

ADJUSTMENT

VOLTAGE
REGULATOR

When
regulating
voltage
as
meas

ured
above
deviates

from
rated
value

adjust
regulator
in

accordance
with
the

following
instructions

I

Inspect
contact
surface
and
if

rough
lightly
polish
with
fine

emery

paper
1
500
or
600

2
Measure
each

gap
and

adjust
if

necessary
Adjust
core

gap
and

point

gap
in
that
order
No

adjustment
is

required
for

yoke

gap

3

Adjusting
core

gap

Loosen
screw
4
mm
0
157
in

diameter
which
is
used
to
secure

contact
set
on

yoke
and
move
contact

upward
or
downward

properly
See

Figure
EE
49

Core

gap

0
6

to
1
0
mm

0
024
to
0
039
in

EE398

I
Contact

set

2
ThicknesJ
gauge

3
4

mm
0
157
in
dia
screw

4

Crosshead
Jcrewdriver

Fig
EE
49

AdjUJJting
core
gap
Engine
Electrical

System

4

Adjusting

point
gap

Loosen
screw
3

mm
O
lIS
in

diameter
used
to
secure

upper
con

tact
and
move

upper
contact

upward

or
downward
as

necessary
See

Figure

EE
50

Point

gap

035

to
0
45
mm

0
014

to
O
D1S
in

EE399

I
Thicknes

gauge

2
3
mm

0
118
in
dia

screw

3
Cro
Sshelld

screwdriver

4

Upper
contact

Fig
EE
50
Adjusting

point
gap

5

Adjusting
voltage

Adjust
regulating
voltage
as

follows

Loosen
lock
nut

securing

adjusting

screw
Turn
this
screw
clockwise
to

increase
or
counterclockwise
to

decrease

regulating
voltage
See

Figure
EE
5

J
CD

EE400

I

Wrench

2

Crosshead
screwdriver

3

Adjusting
screw

4
l
ock

nut

Fig
EE
51

AdjUJJting
rel
Ulating
voltage

CHARGE
RELAY

Nonna

relay
operating
voltage
is
S

to
IOV
as
measured
at
alternator
A

tenninal

Relay
itself
however

oper

ates
at
4
to
5V

Use
a
DC
voltmeter
and
set

up
a

circuit

as
shown
in

Figure
EE
52

Adjust
charge

relay
in

the
same

manner
as
that
for

voltage
regulator

L

Connect

positive
tenninal
of
voltmeter
to

regulator
lead
connector
N
tenninal
with

negative
terminal

grounded

2
Start

engine
and

keep
it

idle

3
Take
voltmeter

reading

o
Volt

I
Check
for

continuity
be

tween
terminals
of
re

gulator
and
alternator

2
Alternator
circuit

inopera

tive
if

continuity
exists
Below
5
2
Volts

Charge
warning
lamp
on

I
Check
fan
belt
tension

2
If
correct
remove

regulator

and

adjust
as

necessary
Over
5

2
Volts

Charge
warning
lamp
on

Charge
relay
coil
or
contact

points
out
of
order

Replace
regulator

Over
5
2
Volts

Charge
warning
lamp
off

Charge
relay
assembly
is
in

good
condition

EE
23

STEERING
SYSTEM

STEERING

CONTENTS

DESCRIPTION

STEERING
GEAR

Remo
al
and
installation

Disassembly
and

assembly
ST
2

ST
3

ST
3

ST
4
Inspection
and

repair

STEERING
LINKAGE

Removal
and
installation

Inspection
and

repair
ST
5

ST
6

ST
6

ST
7

DESCRIPTION
The
other

end
of
the

cross
rod
is

linked
to
the
idler

arm

connecting

with
the
side

member
located
on
the

opposite
side
of

the

steering

gear
The

two
side
rods

serve
to
connect

the

steering
gear
arm
and
idler
arm
to
the

both

knuckle
arms

right
and
left
hand

sides

With
this
construction

even
if
the

left

andlor

right
wheel
moves
vertical
The

steering
gear
used
on
this

model
series
vehicles
is

e
same
re

circulating
type
This

steering
gear
is

designed

especially
for

easy
operation

and

high

durability

The

steering
linkage
is

of
a

relay

design
of
which

gear
arm
is

connected

to
one
end
of
the

adjustable
cross
rod
ly
and

independently
steering
can
be

safely
maintained

Steering
wheel
rotation
is
converted

to

gear
arm
motion
in

proportion
to

the

gear
ratio

by
the

steering

gear
The

gear
arm
motion

operates
the
side
rod

on
the
same
side
At
the

same
time

the
idler
arm
is
moved

through
the

cross
rod
and
the

opposite
side
rod
is

also
moved

1

Steering
column

shaft

2

Steering
column

jacket

3

Steering
wheel

4
Column

clamp

S
Post

gro
llmet

6

Steering
gear
arm

sr
2
7
Cross
rod

8
Cross
rod
socket

9
Idler
arm

assembly

10
Side
rod

11

Steering
gear
assembly

ST528

Fig
ST

I
Structural
u
w

of
teeriTl
l
tem

Body
Electrical

System

BULB
SPECIFICATIONS

Item

Wattage

Candlepower

Headlamp
Inner

Outer
37
5W

37
5
S0W

Front
combination

lamp

Turn

signal
and

parking
lamp
23
8W
32
3C

Side
marker

lamp

Front

Rear
8W

4C

8W
4C

Rear

combination
lamp

Turn

signal
lamp
A
B

Tail

lamp
B
C

Stop
lamp
A
B

Back

up
lamp
D
A
23W
32C

B
23j8W

32j3C

C
8W
4C

D
23W

32C

7
SW

6C

License

plate
lamp

Engine
compartment
lamp
6W

Room

lamp
5W

Combination
meter
illurnina

tion
17W
iC
x3

Knob
illumination

lamp
3
4W

2C

Heater

control
illumination

lamp
3
4W

2C

TROUBLEDIAGNOSE
AND
CORRECTIONS

HEADLAMP

Condition

Headlarnps
do
not

light
for

both

high
and
low
beams

High
beam
cannot

be
switched
to
low

beam
or
vice
versa
Probable
cause

Burnt
fuse

Loose
connection
or

open
circuit

Faulty
lighting
switch

Faulty
dimmer
switch

Faulty
light
relay

No

ground

Faulty
dimmer
switch

Faulty
light
relay

BE12
Bulb

SAE
trade
number

4001

4002

1034

67

67

1073

1034

67

1073

89

161

158

158

Corrective
action

Correct
cause
and

replace
fuse

Check

wiring
and
or

repair
connection

Conduct

continuity
test
and

replace
if
neces

sary

Check

light
relay
for

proper
operation
and

replace
if

necessary

Clean
and

tighten
ground
terminal

Conduct

continuity
test
and

replace
if
neces

sary

Check

light
relay
for

proper
operation
and

replace
if

necessary

Body
Electrical

System

Circuit

diagram
of
combination
meter

system

BATTERY

r
G
0

J

J

Z2

lIa

I

LlJ

I
Z

J

Z

a
z

J
z
Z

i

g

o
a

I
LlJ

I
ll

B

S

M

D

LIGHT

i
i
RELAY

i2i

mm

S

FROM

J

e
AMP

l1

l1

J
J

00

LlJLlJ

z
z

B

COO
CUT

n

SOLENOID

i

OIL

f
PRESSURE

SWITCH

THERMAL

a

TRANSMITTER

I
FUSIBLE

r
LINK
IGNITION
SWITCH

0
1
lOA

I

g

KG
lOA

r

I

15A

t

15A

i

7
5a

z

u

a
a
I

04LlJ

l1

J
o

02

u
3
FUEL
TANK

J

VOLTAGE

REGULATOR
HAND

BRAKE

SWITCH

J
Jon

0

j

Z

a

l

I
I

I
l

ll
Z

ll
Z

LlJ
LlJ

J
a
J
a

I
I

I
I

1

1

Zza
a

00

a
a

LlJLlJ

ll
ll
a
a
HAZARD

FLASHER

UNIT

L
J

HAZAR

D

SWITCH

I
OFF

ONI

l
I

I

I
2

I

I
3

I

14

61
I
5
6

16

9
I

76

I

FLASHER

UNIT

CJ

TO
LIGHT
IOFF

RELAY

B
l

TERMINAL

I

I

I

LIGHT

SWITCH
21

X
X

BEB57
A

Fig
BE
22
Circuit

diagram
of
combination

meter

ayatt
m
TURN

SIGNAL

SWITCH

I
L

RI

lFLA
I

IR
R

I

IR
L

I

IF
R
u

I

IF
L

u

I

FROM
L1GHT

RELAY
DIMMER

SWITCH

BE

15

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