Blower Motor Diagnoses - Datsun 620 Series 1977 Service Manual

Air
Conditioning
BLOWER MOTOR
DIAGNOSES
Blower motor
inoperative
Check fuse
In fuse block 15A W
Single fuse 15A
at cooling
unit
I
j
IfOK
Check the continuity
and
fitting
offan switch
I
I
If OK
I
I
Connect fan switch
to wiring
harness
2 Turn the
ignition
switch ON IG
3
Set fan switch
at
ON 1 2
or
3
position
Check the
voltage
for blower motor
Blue lead wire is poweI
source
Blue wire
with white
stripe
is
for
grounding
I
I
Voltage
I
I
Check the continuity
and fitting of resistance
on
cooling unit
I
I
If OK
If
damaged
I
I
Replace
blower
motor
Replace
resistance
AC 24
mown fuse
Replace
fuse
j
If
damaged
I
I
Replace
fan switch
No
voltage
Replace
main
relay