wiper blades DATSUN PICK-UP 1977 Service Manual

Body
Electrical

System

WINDSHIELD
WIPER
AND
WASHER

Condition

Windshield

wiper

motor
does
not

operate

Wiper

operating
speed

is
too
slow

Wiper
speed
cannot

be

changed
correctly

Wiper
motor
continues

to

run
after
switch

is
turned
off
or

wiper

blades
do

not
return

to
correct

position
Probable
cause

Burnt
fuse

Damaged
motor

Check

wiper
motor
as
outlined
in

Inspec

tion

Loose
connection

Faulty
wiper
and

washer
switch

Test

continuity
through
switch
as

outlined

in

Inspection

Open

power
circuit

or

ground
circuit

Damaged
motor

Loose
or

poor
connection

Seized
or

rusted

wiper
linkage

Humming
occurs
on
motor
in

wiper
blade

operating
cycle

Wiper
blades
stick
on
windshield

glass

Raise
arm
and

operate
wiper
without

load

Faulty
wiper
switch

Damaged
motor

Faulty
auto

stop
operation

Poor
connection

Faulty
switch

BE
34
Corrective
action

Correct

cause
and

replace
fuse

Replace
wiper
motor

Repair

Replace

Repair

Replace
motor

Repair

Lubricate

or
replace

Clean
windshield

glass
and
or

replace
wiper

blade

Replace

Replace

Remove

auto

stop
device

cover
and

check

relay
contacts

Clean

dirty
contacts
or

repair
relay
plate

bending
if

necessary

Repair

Replace