engine DATSUN PICK-UP 1977 Service Manual

Body
Electrical

System

ELECTRICAL
ACCESSORIES

CONTENTS

HORN

DESCRIPTION

REMOVAL
AND
INSTALLATION

IGNITION
SWITCH

REMOVAL
AND
INSTALLATION

INSPECTION

WINDSHIELD
WIPER
AND
WASHER

REMOVAL
AND
INSTALLATION

INSPECTION

RADIO

REMOVAL
AND
INSTALLATION

ADJUSTMENT

CLOCK

REMOVAL

I
NST
ALLA
TION

HEATER

DESCRIPTION

AIRFLOW

HEATER
UNIT
ASSEMBLY
BE
21

BE
21

BE
21

8E
n

BE
22

BE
22

BE
23

BE
23

BE
23

BE
25

BE
25

BE
25

BE
25

BE
25

BE
26

BE
26

BE
26

BE
28

BE
29

HORN

DESCRIPTION

The

horn
circuit
includes

a
horn

relay
Current
from
the

battery
flows

through
the
fusible
link
and
fuse
to

the
horn

relay
terminal
B

where
it
is

shunted

by
the
two
circuits
In
one

circuit
terminal
S
the
current
flow
is

supplied
through
the
solenoid
and

Fusible
link

Qi
att
Fu

H

I
HIBQ

t
J

JJI

L
J

Hornrelay

Qm
HEATER
CORE

FAN

MOTOR

CONTROL
ASSEMBLY

ADJUSTMENT

SPECIFICATIONS

TACHOMETER

REPLACEMENT

8UL8
REPLACEMENT

SEAT
8ELT
WARNING

SYSTEM

DESCRIPTION

REMOVAL
AND
INSTALLATION

WARNING
LAMP
BULB
REPLACEMENT

INSPECTION

TROUBLE
DIAGNOSES
AND

CORRECTIONS

HORN

WINDSHIELD
WIPER
AND
WASHER

RADIO

Horn
button

BE859A

Fig
BE

29
Circuit

diagram
of
horn

sy
tem
horn
button

to
the

ground
In

the

other
circuit
terminal
H
the
current

flow
is

supplied
through
the

relay

contacts
and
horn

Horn
bracket

serves
as
a

grounding

When
the
horn
button
is

pressed

current
from
the

battery
energizes
the

solenoid
As
the
solenoid
is

energized

the

relay
contacts
are
closed
This

allows
the
current
to
flow
to
the
horn

BE
21
REMOVAL
AND

INSTALLATION

Horn
8E
29

BE
29

BE
29

8E
29

BE
30

BE
30

BE
30

8E
30

8E
31

BE
31

BE
31

8E
31

8E
31

BE
33

8E
33

8E

34

BE
35

I

Disconnect

battery
ground
cable

2
Disconnect
horn
wire
at
terminal

on
horn

body

3
Remove
horn

retaining
bolt

4
Install
horn
in
the
reverse
se

quence
of
removal

Horn

relay

The
horn

relay
is
installed
on
the

hoodIedge
on
the

right
side
of
the

engine
compartment

I
Disconnect

battery
ground
cable

2
Disconnect
horn
relay
wire
con

nector
at
terminals
on
horn
relay

3
Remove

retaining
screws

4
Install
horn

relay
in
the
reverse

sequence
of
removal

Operation
of
the
heater
is

control

led

by
two
control
levers
located
on

the
instrument

panel
and
a
hand

op

erated
knob
on
the
center
of
the

heater
unit

The
AIR
LEVER
controls
the
air

intake
valve
and

or
room
valve

by
its

lever

positions
OFF
DEFROST
and

ROOM
through
the
control
cables

The
air
intake
valve
draws
the
fresh

outside
air

from
the
cowl

top
grille

and

supplies
the
air
into
the
heater

unit

The
room
valve
is

located
at
the

bottom
of
the

heater
unit
The
air

coming
through
the
air
intake
valve

opening
is

forced
through
the
heater

core
to
the
room

valve
where
the
air
is

distributed
to
the

floor
outlet
and
or

defroster
outlets

depending
on
the

position
of
the
room
valve

The

VENT
KNOB
is

directly
linked

to
the
vent
valve
which

provides
fresh

air

for
the

passenger
Push
the
knob
all

the

way
in

to

open
the
valve
The
fresh

ventilating
air

comes
out
of
the
heater

center
outlet

The
TEMP
lever
is
a

dual

pur

pose
control
one
is

for

regulating
the

flow
of

engine
coolant

flowing
into
Body
Electrical

System

the
heater
unit
and
the
other
for
the

operation
of
the
fan
motor
When
the

lever
is
in

the
OFF

position
the
water

cock
is

closed
and
the
circulation
of

engine
coolant

through
the
heater
core

stops
When
the
lever
is
slided
to

any

other

position
than
OFF
the
water
cock

opens
in

proportion
to
the

lever

setting
and
allow

engine
coolant

to

flow
into
heater
core

To
control
the
fan
motor

opera

tion

push
or

pull
the
lever
knob
Two

speeds
are

provided
for
the

fan
motor

by
using
a
three

position
switch

FUSE

IOfF
UlwlHI

ON
1

t

f
SWITCH

u

FUSI
BlE

rl
HEATE

R

LINK
SWITCH

is

G
luJ

BATTERY
HEATER
MOTOR

H
EATER
UN
IT

BE868A

Fig
BE
46
Circuit

diagram
of
heater

8E
27

HEATER
UNIT
ASSEMBLY

Removal

L
Disconnect

battery
ground
cable

2

Drain

engine
coolant

3

Remove
defroster
hoses

4

Remove
three

cable

retaining

clips
and
disconnect
control
cables

from
valves
and
water

cock

5

Disconnect
two

fan
motor
lead

wires
from
each
connector

6
Disconnect
two
resistor

lead
wires

from
each
connector

7

Disconnect
water
hoses
from
core

and
water
cock

8

Remove
three

heater
housing

mounting
bolts
and

dismount
heater

unit
from
vehicle

Installation

1

Position
heater
unit
under
instru

ment

panel
and
install
three
heater

unit

securing
bolts

2

Install
water
hoses

3
Position
heater

control
cables
to

room
valve
air
intake
valve
and
water

cock

4

Adjust
control
cable

length
for

proper
operation
as

outlined
in

Adjust

ment

5
Connect
fan
motor
wires
and

resistance
wires

to
each
connector

plug

6

Install
defroster
hoses

7

Connect

battery
ground
cable

8
Fill

cooling

systeIT

9
Run

engine
at
2
000

rpm
with

AIR

lever
in

the
HOT

position

Make
sure
that

engine
coolant
is
fIlled

up
to
correct
level

HEATER
CORE

Removal
and
installation

L

Drain

engine
coolant

2
Remove
defroster
hoses

3
Disconnect
water
hoses
from
inlet

and
outlet

pipes
of
heater
core

4

Remove
four

clips
and
front

cover
Body
Electrical

System

BE869A

Fig
BE
48

Removing
front
cov
r

S

Withdraw
heater
core
from
heater

housing

BE870A

Fig
BE
49

Removing
heater
core

6

Install
heater
core
in

the
reverse

sequence
of

removal

FAN
MOTOR

Removal
and
Installation

L
Dismount
heater
unit

assembly

from
vehicle

as
outlined
in
Removal
of

Heater
Unit
Assembly

2
Remove
nine

spring
clips
and

disassemble
heater

housing

3
Remove
fan
from
fan
motor

4
Remove
fan

motor

retaining

screws
and
fan
motor

S
Assemble
heater

housing
and
in

stall
heater
unit

to
vehicle
in
the

reverse

sequence
of
removal

as
out

lined
in

Installation
of

Heater
Unit

Assembly

I

CONTROL
ASSEMBLY

Removal
and
Installation

I
Remove
three
cable

retaining

clips
and
disconnect
control
cables

from
valves
and
cock

BE
29
2

Disconnect
three
lead
wires

from

each
connector

plug

3

Remove
radio
bezel
from
the

front
of
radio

following
instructions

in

steps
I

to
3
in

Removal
of
Radio

4

Remove
heater
control
knobs
and

heater

bezel

5

Remove
two

retaining
bolts
and

heater
control

assembly

6
Install
control

assembly
in
the

reverse

sequence
of

removal
When

connecting
control
cables

to
valves
and

cock

adjust
control
cable

length
as

outlined
in

Adjustment

ADJUSTMENT

AIR
lever

L
Move
AIR
lever
to
the
DEF

position

2

Open
air
intake

valve
and

connect

control

cable
to
air
intake
valve

3

Clip
control
cable
with
cable

re

taining
clip

Fig
BE
50
A
iT
intake
valve

4
Pull
room
valve

upward
and
con

nect
control
cable
to
room
valve

5

Clip
control
cable
with

cable
re

taining
clip

BE871A

Fig
BE
51

Room
valve

TEMP
lever

1

Move
TEMP
lever
to
the

OFF

position

2
Connect
control
cable
to
the
lever

of
water
ock
when

water
cock
lever
is

pulled
forward

fully
closed

3
Install
control
cable
on
water

cock
bracket
with
cable

retaining
clip

SPECIFICATIONS

Item

FAN
MOTOR

Rated

power
consumption

Revolution

rpm

Fan
dia
mm
in

TACHOMETER

The
tachometer
is

optional
on

model
HL620
It
is
an

integral
part
of

the

ignition
system
It
counts
the

pulses
entering
the

ignition
coil
and

indicates
the

number
of

engine
revolu

tions

REPLACEMENT

I

Remove

battery
ground
cable

2

Remve
cluster
lid

following

instructions
iri

steps
I
to
4
of
Removal

in

Combination
Meter
Body
Electrical

System

BE872A

Fig
BE

52
Water
cock

General
use
Extremely
cold

weather

use
2
RG
The
red

with

green

stripe
lead

wire

must
be

connected
to

flat

plate
terminal
at
back
of

combination
meter

3
B

The
black
lead

wire
must
be

connected

to
T

shaped
ter

minal
at
back
of

combination

meter

4

YR

The

yellow
with

red

stripe

lead
wire
must

be
connected

to

pole
terminal
at
back
of

combination
meter

6
Pass

tachllmeter
wires

through

grommet
on
hood
lock
control
wire

and
connect
to

negative
terminal
of

ignition
coil

Notes

a

Fix

grommet
with
an
adhesive

tape

or
a

sealing
compound
to

prevent

water

leakage

b
Attach
tachometer
wires
to
hood

lock

control
wire
with
an
adhesive

tape

BULB
REPLACEMENT

I
Remove
tachometer
as

previously

described

2

Twist
illumination
bulh
socket
at

back
of
tachometer
Bulb
with
socket

can
then
be

easily
removed

3

Remove
bulb

4

Install
new
bulb
in

reverse
se

quence
of
removal

Bulb

wattage

Tachometer
illumination

lamp
3
4W
12V

less
than
36W

3

600

110
433
12V

less
than
SSW

2

SOO

110
4
33

3
Disconnect

four
tachometer
lead

wire
connectors

They
are
connected

to

combination
meter
and
tachometer

cable

4

Remove
three

screws
and
then

remove
tachometer
from

cluster
lid

5

Install
in
reverse

sequence
of
re

moval
When

connecting
lead
wire

note

the

following

1
BW
The
black
with
white

striped

lead
wire

must
be
connected

to

identically
colored
ta

chometer

cable

coming
from

engine

compartment

BE

30
BE965

Fig
BE
53

Tachometer

Body
Electrical

System

RADIO

Noise

prevention

Position
vehicle
in
an

open
area

away
from
steel

buildings
run

engine
extend
antenna
to
its
maximum

length
set
volume

control

to
maximum
and
set
dial
at
a
medium

point
without

catching
broadcasting
wave

Condition

Ignition

system

Noise
occurs
when

engine
is

op

erated

Charging
system

Sound
of

alternating
current

pre

sents

When

accelerator

pedal
is

depressed

or

released
noise

presents

Supplement
equipment

When

engine
starts
noise

presents

Noise

still

presents
even
after

stop

ping
engine

Notes

a
Be
sure
to
locate

capacitor
as

close

as
to

noise
source
and
connect
in

parallel
Probable
cause
Corrective
action

High
tension
wire

Install
new

high
tension
wire

Ignition
coil
Install
a
0

51lF

capacitor
to

primary
side

terminal
of

ignition
coil

Note
Be

careful
not
to
install

capacitor
to

secondary
or

primary
breaker
side
other

wise

engine
becomes

improper

Install
bond

strap

Distributor
Secure
contact
of
carbon
electric

pole
and

rotor

Eliminate

sharp
tip
on

rotor

pole
or

cap
pole

by

scrubbing
with
a

screwdriver

Check

stagger
between
rotor

and
stator

Alternator
Install
a
0

51lF
capacitor
to

charging
termi

nalA

Note
Do

not

use
a
larger
capacitor

If

capacitor
is

installed
to
terminal
F

alternator
coil
will
be

damaged

Regulator
Install
a
0

51lF
capacitor
to
IGN
terminal

of

voltage
regulator

Operative
noise
of
water
tem

perature
and
fuel

gauges
Install
O

IIlF
capacitor
between
terminal
and

ground
wire

Note
If

a

capacitor
having
a

larger
capacity

is
used
indication
of

gauge
will
be
de

viated

b
Cut
lead
wire

as
short
as

possible

c

Ground
wire
should
be
attached
on

the

body

completely

d
Make
installation
and
connection
securely

e

Carefully
identify

or
OUT

mark
IN

BE
35

CD
m
Cl
@
D
@

I

j

1
To
instrument
harness
IS
To
battery
30
To
check
connector

2
To
full
transistor
amplifier
16
To
fusible
link
3t
To
headlamp
L
U
type
2

California
models
only
17
To
engine
harness
No
2
32
To
sido
marker
lamp
L
B

3
To
hood
switch
18
To
alternator
33
To
front
combination
lamp
L
H

4
To
engine
compartment
lamp
1
9
To
front
combination
lamp
R
n
34
To
horn
Low

ll
l
S
To
washer
motor
20
To
headlamp
R
H
type
2
3S
To
horn
High

l
l
0
6
To
auto
choke
heater
relay
1
To
side
marker
lamp
R
n
36
To
B
C
D
D
cut
olenoid
California
models

7
To
detector
dri
e
counter
22
To
headlamp
R
B
type
1
only

Non
Califunia
model
except
for
Canada
23
To
ground
37
To
block
tcrminal
distributor
California

8
To
ignition
relay
California
models
only
i4
To
thermal
transmitter
models
only

9
To
floor
sensor
relay
California
modeb
only
is
To
distributor
Non
California
models
only
38
To
ignition
coil
Non
California
models
only

n
10
To
inhibitor
relay
A
T
only
26
To
8
C
D
D
cut
solenoid
Non
California
39
To
condenser

t
II
To
head
lamp
relay
models
only
40
To
ignition
coil
and
resistor
@

12
To
horn
relay
27
To
fuel
cut
solenoid
California
models
only

OJ
v

m
13
To
voltage
regulator
28
To
auto
choke
heater

g
e
14
To
cooler
cable
29
To
headlamp
L
R
type
1

OJ
to

o
Q
m
r0

C
1
i

Ql
CIl
Il
l
3

m
ii
bl
l

l
l
if
3
i
m
1
Kickdown
solenoid
AlT

2
Oip

3
Inhibitor
switch
AfT

4
Oip

5
Engine

6
Battery
cable

7
Engine
slinger

8
Battery
cable
r
0
w
I

I

cf
n

L
J

TO
ENGtNE
ROOM
HARNESS
OJ

o
Q
m

O
Q
CIl
II

D
3

m
W

D
to
l
l
0
c
l
l
s
Q
3
For
Automatic

Transmission
LB

B

For
Manual
Transmission

m
For
Automatic
Transmission

COLOR
CODE

B
Black

BI
Brown

G
Green

L
Blue

Lg
Light
green

R
Red

W
White

Y
Yellow

BW
Black
with
white
stripe

LgR
Light
green
with
red
stripe
BY
RB
RB

B
WB
RB

YB
2
RB
I
B

1

BW
r
BY

LB

For
Automatic

Transmission
to

o
c
m
r0

O
O
Dl

For
Manual

Transmission
@
CJ
lti
3

RB
fB

BY
YB
RB@RB
YB
BY

1
To
kickdown
solenoid

fOT
Automatic
Transmission

2
To
reverse
switch

for
Manual
Tranmission

3
To
inhibitor
switch

for
Automatic
Transmission

4
To
oil
pressure
switch

5
To
starter
motor

6
To
engine
room
harness

for
Manual
Transmission

7
To
engine
room
harness

for
Automatic
Transmission

m
J
c
@
@
r

1
I
I

I
II

U
j
J

r
U

I
IT

L
U
L
L

@

Qj
flll
I

1

I
I

1

lL

to
t
l

Q
1
To
room
Jamp
cable

2
To
light
switch

3
To
fuse

4
To
tachometer
or
clock

5
To
hazard
flasher
unit

6
To
stop
lamp
switch

7
To
ignition
switch

8
To
hazard
switch

9
To
tU
and
dimmer
switch

10
To
check
connector

11
To
AMP
M
T
only

11
To
combination
instrument

Non
California
mode15
except
for
Canada

13
To
combination
meter

14
To
flasher
unit

IS
To
kickdown
switch
AfT
only

16
To
hand
brake
switch

17
To
heater
motor

18
To
illumination
control
rheostat
19
To
wiper
switch
light
switch
illumination

lamp

20
To
wiper
switch

21
To
cigar
lighter

22
To
heater
control
illumination
lamp

23
To
radio

24
To
heater
control

25
To
belt
and
E
G
R
warning
lamp

Non
California
models
or
floor
te
peratuJe

California
models

26
To
heater
control
illumination
lamp

27
To
buzzer

28
To
belt
warning
timer
U
S
A
Olodels

29
To
indicator
lamp
AfT
only

30
To
cooler
harness

31
To
wiptr
motor

32
To
door
switch
R
H

33
To
engine
compartment
harness

34
To
floor
harness

E
m

S
@
o
J
o

Q
m
CD
n

Ql
en
I
i
3

@
BG
B
LW
LW
B
L

AL
l
J
YA

CD
m
LW
4
ft
GL

LR
t4
B
t
R

LG
4D
It
GW

BW
GW

L

@

ii
b
l
l
l
lD
m

en
lD
A
A
G
Ri
G
L

Non
California

except
Canada
I

G
GR
13
L
R
j

M
T
only
GL

A
T
only
To
engine

compartment
harness

Non
california
except
Canada
G
r

wRfl
Lt
IIY

LIB
l
ll
RY
R
oIll
CD

o
c
m
o
O
II
fJl
1
3