fog light DATSUN B110 1973 Service Repair Manual

BODY

b

Method
2

Start
the

engine
and
turn
on
the
window

defogger
system
With
a
d
c

voltmeter

setup
shown
in

Figure
BF

70
check
each
heat
wire

for

discontinuity

If

the
meter
indicates
12
volts

or
0
on

a

specific
wire

that

line
is
broken
Normal
indication

6
volts

A

break
in
that
line
can
then

be
detected

by
moving

the

positive
lead

of
meter

along
the

line
until

an

abrupt

variation
in

the
meter
indication
is

encountered

Fig
BF
70

Checking
for
broken
heat
wire

with
d
c
voltmeter

c

Method
3

With
an
ohmmeter

setup
shown
in

Figure

BF
7l
locate
one

lead
on
each
end
of
a
heat
wire
and

the

other
in
the
rniddle
section

of
that
wire
If

the

meter

registers
on

a
specific

grid
line
a

value
twice
as

much
on

any
other
line
that

line
is
broken

A

break
in
that

line
can
then
be

located

by
an

abrupt

variation
in
the

meter
indication
as
the
test

lead
moves

along
the
broken
heat
wire

r

I

I

I

J

I

I
v

Ejl

Fig
BF
71

Checking
for
broken

heat
wire
with

ohmmeter
2

Repair

a

Repair
equipment

1
Conductive
silver

composition
Dupont
No
4817

2
Ruler
30

em

11
81

in

long

3

Drawing

pen

4
Heat

gun

5

Alcohol

6
Cloth

b

Repair
procedure

1

Wipe
clean
broken
heat
wire
and
its

surrounding

area

with
a
cloth

dampened
in

alcohol

2

Apply
a

small
amount
of

conductive
silver

composi

tion

to
the

tip
of

drawing

pen

Note
Shake
silver

composition
container

sufficiently

before
use

3

Place
ruler
on

glass
along
broken
line

to
be

repaired

as

shown
in

Figure
BF

72

Deposite
conductive

silver

composition
to
break
line
with

drawing

pen

Slightly
overlap
existing
heat
wire

either
side
5
mm

0
1969
in

preferable
of
the

break

Heat
wire
0
en

0
0

d
ci

1
I
Break

I
1

I

kr

I
I

Ruler

Drawing

pen

Unit
mm

in

Fig
BF
72

Locating
ruler
in

position

8F

35