heater DATSUN PICK-UP 1977 User Guide

CAB
BODY
Body
Frame

Ist

mounting
2nd

mounting

1
Bolt

2

Plain

washer

3
Rubber
washer

4

Upper
rubber

5
Bottom

rubber

6
Plain
w

er

7

Upper
washer

8

Lower
washer

1st

mounting

REMOVAL

AND

INSTALLATION

Remove

battery
from

engine

compartment

2

Disconnect
oil
cooler
hoses
from

radiator
automatic
transmission

model

only

3

Disconnect
air
conditioner

tubes

from

condenser
if
so

equipped

4

Drain
water
from

cooling
system

completely
and
remove
radiator

and

condenser
if
so

equipped

5

Remove

engine
hood
from
hood

hinges
after

scribing
hood
for
rein

stallation

6
Remove

bumper
stay
from
frame

and
remove
front

bumper

7
Remove

radiator

grille

8
With
the

aid
of

Steering
Wheel

Puller

ST27
180001
remove

steering

wheel
from

steering
shaft

9

Remove

steering

gear
arm
from

steering
sector
shaft

using
suitable

puller

10

Remove
screws

securing

steering

shaft
dust

seat
and
insulator
in

posi

tion
2nd

mounting

3rd

mounting

II

Remove

steering
gear

housing

from
frame
and

pull
it
out
into

engine

compartment

12

Disconnect

speedometer
cable
at

transmission

1
3

Disconnect

carbon
canister

hoses

between

canister
to

vacuum

gallery
and
canister

to
intake

manifold

at
canister

14

Disconnect
air

pump
to
air

pump
air

cleaner
hose
at
air
cleaner

15

Disconnect
air
conditioner

hoses

from

compressor
if
so

equipped

16

Disconnect
air
cleaner

duct
from

body

17

Disconnect

Master
Vac
vacuum

hose
at
intake

manifold

18
Remove

snap
ring
and
control

lever

pin
from
transmission

striking

guide
and

remove
control
lever

19
Disconnect
fuel

hoses
at
fuel

strainer

20
Disconnect
fuel

return
hose

and

evaporation
hose
at
connectors

21
Disconnect
brake
and
clutch

tubes

from
each

master

cylinder

22
Remove

all

clips
securing
fuel

tubes
brake

tubes
and
clutch
tube
at

cab

body

BF
4
BF472A

Unit
mm
in

Fig
BF
4
Cab

body
mountings

23
Loosen
hand
brake
control
cable

at
brake
control
lever

Then
discon

nect
cable
from
dash

panel

Note

Place
blocks

against
front
and

rear
wheels
to

prevent
vehicle
from

rolling
off

accidentally

24
Free

accelerator
wire
from

car

buretor

25
Disconnect

heater
hoses
at

engine
side

26
Disconnect
wire
harnesses
from

related

engine
electrical

parts

27
Disconnect

engine
and

chassis

harnesses
at
their
connection

on

right

sidemember
near

rear

engine
mounting

member

28
Remove
six

bolts

securing
body

to
frame

29
With
the
use
of
suitable

ropes

and
an
overhead
hoist
lift
cab

body

straight
up

slowly
and

place
it
on
a

level
surface

Note
In

lifting
up
cab

body
use

care

not
to

dash
it

against

engine
or
rear

body
Cab

body

weighs
approxi

mately
220

kg
485
Ib

BF646A
Body
Frame

INSTRUMENT
PANEL

1

Bracket
welded
to
dash

panel

2
Nut

3
Instrument

panel
assembly

Fig
BF
41
Instrument

panel
assembly

INSTRUMENT

PANEL

REMOVAL
AND

INSTALLATION
2

Disconnect
heater
control
cables

from
heater

assembly

3
Disconnect

speedometer
cable
on

the
back

of

speedometer

4

Disconnect
antenna
and

speaker
Disconnect

battery
cables

8F
17
wiring
harnesses
at
connectors

5

Disconnect
relative

wiring
har

nesses
from

instrument

panel
at
con

nectors

6

Remove

steering
column
shell

Removal
of

steering
wheel
at
this

stage

facilitates
further

removal
of
instru

ment

panel

7

Remove
two
side

ventilator

knobs

Remove

package
tray
attaching

bolt

and
detach

package
tray

2

I

Package
tray

2
Side

ventilator
knob

Fig
BF
42

Package

tray

8

Support
instrument

panel
assem

bly
and

remove
five

attaching
bolts

from

it

9

Withdraw
instrument

panel
as

sembly
while

lifting
it

slightly

10

To

install
reverse

the
order

of

removal

ENGINE

COMPARTMENT

LAMP

2

1

Screw

2

Bracket

3
Bulb

BE
7038

Fill
BE
14

Engine
compartment
lamp

Bulb
can

be

replaced
by

pushing
in

on
bulb
and

turning
it

counterclock

wise

To

replace
engine
compartment

lamp
assembly
remove
one
SCrew

retaining

lamp
bracket
to

upper
dash

panel
and
disconnect
wires
at
connee

tors

Engine

compartment
lamp
switch

can
be

replaced
by
disconnecting
lead

wire

at
connector
and

pulling
switch

assembly
out
of
its
bracket
To
install

switch

assembly
to
bracket
clean
dirt

dust
and

rust
from
the

opening
groove

of
bracket
and

press
down
on
switch

head
until
it
fits
in
with
bracket

LIGHTING

SWITCH

REMOVAL
AND

INSTALLATION

I

Disconnect

battery
ground
cable

2
Press
in
switch

knob
turn
it

counterclockwise
and

pull
it

out
of

switch

3

Unscrew
escutcheon

and
remove

escutcheon

and

spacer

4

Reach

up
from
underneath

instru

ment

panel
disconnect

lighting
switch

multiple
connector

from
instrument

harness

wiring

assembly
and

remove

spacer
and

lighting
switch

5

Install

new
switch
in

the
reverse

sequence
of

removal
Body
Electrical

System

INSPECTION

Remove

lighting
switch
from
vehi

cle

following
the

procedures
given
in

Switch

position
1

terminal

ILLUMINATION

CONTROL
RHEOSTAT

This
illumination
control

rheostat

controls
the

brightness
of
the
iliumina
Removal
and

Installation

Test

continuity
through

lighting

switch

by
using
test

lamp
or

ohm

meter

I
I
SWITCH

TERMINAL
P
T10N

ICI
F
2

I
I

b

I
4

I
I

6
terminal

I
3

I
6

3
terminal

4
terminal

BE855A

Fig
BE
15

Lighting
switch

tion

lamps
of
the

combination
meter

heater

control

wiper
and

lighting

switch
knob
it

is
a

variable
resistor

and

its
value
can
be

controlled

by
a

knob

REMOVAL
AND

INSTALLATION

I

Pull
out
knob
of

switch

2

Remove

ring
nut

retaining
switch

to
instrument

panel

3
Disconnect
lead

wires
for

switch

at

connector

4

Switch

body
can
be
taken
out

from

behind
instrument

panel

5

Installation
is

in
the

reverse
se

quence
of
removal

BE

9
0@

BE
7048

Fig
BE
16
Illumination

control
rhe08tat

INSPECTION

Test

continuity
between
two
lead

wires

with
a

test

lamp
or

an
ohm

meter

When
switch
is
in
the
OFF

position
continuity
must
not

exist
In

the
ON

position
resistance

between

the

two
lead
wires

must
be
between
0

and

3512

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

REMOVAL
AND

INSTALLATION

I

Disconnect

battery
ground
cable

2

Working
through
meter

openings

of

cluster
lid
remove

three
screws

retaining
cluster

lid
to
instrument

panel

3

From
underneath
instrument

panel
remove
one
screw

retaining
me

ter

assembly
to
lower

panel
of
instru

ment

4

Withdraw
cluster
lid

slightly
For

ccess
to
switches
knobs
etc
follow

the

procedures

given
in

each
section

5

From
behind

combination
meter

disconnect

speedometer
cable

at

speedometer
head
and

multiple
con

nector
instrume

nt
wire

assembly

from

printed
circuit

6
On
vehicle
with
clock

disconnect

wires

at
each
connection

on
meter

printed
circuit

7
Remove
four
screws

retaining

me
ter

assembly
to
cluster
lid

8

Remov
combination
meter

as

sembly

9
When

installing
combination

me

ter

assembly
follow

the
reverse
se

quence
of
removal

Fig
BE

23

Removing
eluster
lid

SPEEDOMETER

REMOVAL
AND

INSTALLATION

1

Remove
combination
meter

as

sembly
Follow
the

procedures
under

Removal
and
Installation
in
Combina

tion

Meter
Body
Electrical

System

2
Remove
meter
front
cover
and

shadow

plate
by

removing
clips
and

screws

3

Remove
screws

retaining
speed

ometer
to

printed
circuit

housing
and

remove

speedometer

4
Install

speedometer
in
the

reverse

sequence
of
removal

ODOMETER
SWITCH

REMOVAL

AND

INSTALLATION

I
Remove

speedometer
as
outlined

under

Speedometer

2
Remove
odometer

retaining

screws

3
Install
odometer
in
the
reverse

sequence
of
removal

BE342A

Fig
BE

24
Odometerswitch

FUEL

GAUGE

AND
WATER

TEMPERATURE

GAUGE

DESCRI

PTION

The
fuel

gauge
consists

of
a

tank

unit

located
in
the

fuel
tank

and
fuel

gauge
The
tank

unit

detects
fuel
level

with
its

float

converts
fuel
level
varia

tion
to
a
resistance

of
slide
resistor

installed

on
the
float
base
and

thus

controls

current

flowing
to
the
fuel

gauge

BE16
The
water

temperature
gauge
con

sists
of
a

gauge
and
thermal
transmit

ter
located
in
the

engine
block
The

thermal
transmitter
is

equipped
with

a

thermistor
element

which
converts

cooling
water

temperature
variation

to

a
resistance
and
thus
the
thermal

tr

t
c

rtrols
cUfTent
flowing
to

the

gauge

The

fuel

gauge
and

water

tempera

ture

gauge
are

provided
with
a
bi
metal

arm
and
heater
coil
When
the

ignition

switch
is

set
to
ON
current
flows
to

the
heat
coil
and
the
heat
coil
is

heated
With
this
heat
the
bi
metal

arm
is

bent
and
thus
the

pointer

connected
to
the
bi
metal

arm
is

oper

ated
The
characteristics

of
both

gauges
are
the

same

A
tolerance

may
occur
on
the

water

temperature
gauge
or
fuel

gauge
due
to

source

voltage
fluctuation
The

voltage

regulator
is
used
to

supply
a

constant

voltage
so
that

the
water

temperature

gauge
and
fuel

gauge
operate
correctly

The

operating
part
of
the

regulator

consists
of
a
bi

metal

arm
and

a
heater

coil
When
the

ignition
switch
is

turned
on
the
bi
metal

arm
is
heated

and
bent

by
the
coil

opening
the

contact

Consequently
current
to

the

coil
is

interrupted
As

the
bi
metal

cools
the

contact
closes
The

repeti

tion

of
this

operation

produces
a

pulsating
voltage
of
8
volts
which
is

applied
to
the

water

temperature
and

fuel

gauges

If
both
the
water

temperature

gauge
and
fuel

gauge
become

faulty
at

the

same
time
this

may
be
attributed

to

problem
in
the

voltage
regulator

REMOVAL
AND

INSTALLATION

1
Remove

combination
meter
as

sembly
Follow
the

procedures
under

Removal

and
Installation
in
Combina

tion

Meter

2

Remove
meter
front
cover
and

shadow

plate
by

removing
clips
and

screws

3
Remove

retaining
nuts
at
the

back
side
of
combination

meter
as

sembly
and
remove

meter

4

Install
meter
in

the
reverse
se

quence
of

removal

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

Body
Electrical

System

Horn
switch

The
horn
switch
is

integral
with

the

turn

signal
and
dimmer
switch
as

sembly
Remove
switch

assembly
as

outlined
in
Turn

Signal
and
Dimmer

Switch

IGNITION
SWITCH
BE861A

Fig
BE

3
I

Removing
ignition
switch

REMOVAL
AND

INSTALLATION

I
Disconnect

battery
ground
cable

from

battery

2
Unscrew
and
remove
escutcheon

from
the
front
of

ignition
switch

3
Withdraw

ignition
switch
and

wiring
assembly
with

spacer
from

shell
cover
as
shown
in

Figure
BE
3

4

Disconnect
wiring
connector

from
the
back
of

ignition
switch

5

Replace
ignition
switch
with
a

new
one

6
Connect

ignition
switch
to

wiring

connector

7

Position

ignition
switch
to
shell

cover

opening
install
and

tighten

escutcheon
and
secure
ignition
switch

to
shell
cover
R
terminal

1G
terminal

ST
terminal

B
terminal

8E

22
1

Voltage

regulator

2
Horn

relay

3

Headlamp
relay

4

Ignition
relay
California

only

5

Auto
choke
heater

relay

6

Compressor
relay

Au
conditioner

equipped
model

7

Floor
sensor

relay
California

only

8
Inhibitor

relay
Automatic

tran5mission

only

INSPECTION
BE683B

Fig
BE
30

ContInuity
test

Test

continuity

through
ignition

switch

by
using
test

lamp
or
ohm

meter

C

A
terminal
TERMINAL
0

F

F

B

IG

ST

A

R
KEY

FOSITlON

t

1

o

j
u

u

I

I
A

C

C

Fig
BE

32

Ignition
witch
BE6848

INSTALLATION

I
Position
clock
to

cluster
lid
and

install
three
screws

2

Connect
three
wire
connectors
of

clock

to
each
connection
two
to

combination
meter

printed
circuit
one

to
instrument
h
ness

wiring

3

Install
cluster
lid
to
instrument

panel

4

Connect
battery

ground
cable

HEATER

DESCRIPTION

@
Body
Electrical

System

Fig
BE
44
Clock

1
Defroster
nozzle
L
U

2
Deflor
tcr
duct
L
R

3
Heater

control

4

Resistor

5
Heater
motor

6
Heater
case
7
Ventilator
knob

8
Heater
core

9
Conuol
cable

clip

10
Heater
cock

11
Defroster

duct
R
H

12
Defroster
nozzle
R
H

BE687B

Fig
BE
45
Heater
comtruction

BE

26

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

Body
Electrical

System

AIRFLOW

OFF

VENTILATING

Push
Vent
valve

Heater
core

c

n

e
NlL
fAl

u

c
J
u
IUl

g

Push

Pull

DEFROSTING

VENTILATING
HEATING

0
tTIlsl

IU
lI

D
WI
Push
Pull

g

IIt
J

L

I
I

Pull

Pull

DEFROSTING

HEATING

n
C
IU

n

HU

I
ff

UIUI

C
J

CIl

JIlT

Ill

Pull
J

11

Pull

BE397

Fig
BE

47

Airflow

8E

28