Page 524 of 548
Note
When
installing
thermostat
in
sert
capillary
tube
in
same
place
as
it
was
before
removal
Be
sure
to
insert
capillary
tube
end
about
SO
em
19
7
in
from
evaporator
core
INSPECTION
1
Test
continuity
between
two
switch
terminals
with
test
lamp
or
ohmmerter
Continuity
should
exist
2
With
capillary
tube
end
dipped
into
ice
salt
water
maintained
to
I
oc
300
F
test
continuity
between
two
switch
terminals
Continuity
should
not
exist
3
If
switch
is
found
damaged
re
place
MAIN
RELAY
REMOVAL
AND
INSTALLATION
I
Disconnect
battery
ground
cable
2
Remove
glove
box
3
Disconnect
connector
from
main
relay
4
Remove
screw
retaining
main
relay
to
cooling
unit
then
remove
main
relay
5
Installation
is
in
the
reverse
order
of
removal
INSPECTION
Test
continuity
of
relay
with
ohm
meter
or
test
lamp
In
testing
main
relay
there
must
be
continuity
be
tween
CD
and
CV
When
l2Y
direct
current
is
applied
to
CD
CV
CID
@
normally
close
ti
I
I
6
i
i
f
i
f
Fig
AC
33
Air
Conditioning
HEATER
UNIT
Refer
to
Heater
Unit
Section
BE
WATER
COCK
Refer
to
Water
Cock
Section
BE
BLOWER
MOTOR
Refer
to
Blower
Motor
Section
BE
RESISTOR
Refer
to
Resistor
Section
BE
MICROSWITCH
CV
REMOVAL
AND
INSTALLATION
1
Remove
air
conditioner
control
assembly
Refer
to
Heater
Control
Assembly
Section
BE
2
Remove
screws
attaching
micro
switch
and
then
remove
rnicroswitch
3
Install
rnicroswitch
in
the
reverse
order
of
removal
I
NSPECTI
ON
Make
sure
that
continuity
exists
in
AC
23
AIR
CONDITIONER
CONTROL
Refer
to
Heater
Control
Assembly
for
Air
Conditioner
Section
BE
Note
When
adjusting
AIC
control
cable
and
rod
keep
in
mind
that
OFF
on
front
panel
is
used
as
A
C
for
air
conditioning
sys
tem
FAN
SWITCH
Refer
to
Fan
Switch
Section
BE
1
Microswitch
2
Fan
switch
AC19SA
Fig
AC
34
Microswitch
rnicroswitch
when
its
protruding
part
is
pushed
w
AC199A
Fig
AC
35
Microswitch
Page 526 of 548
WIRING
DIAGRAM
CIRCUIT
DIAGRAM
Air
conditioner
system
G
DD
w
FUSIBLE
LINK
I
BATTERY
LG
Lr
LG
c
J
LW
J
I
THERMOSTAT
W
W
r
B
B
8
ALTERNATOR
IGNITION
SWITCH
il
W
LB
LLG
J
LOW
PRESSURE
SWITCH
L
c
J
L
c
J
l
J
MAGNET
VALVE
L
c
J
CJ
C
COMPRE
SOR
CLUTCH
LIT
IACC
15A
L1
3
E
FUSE
BLOCK
Air
Conditioning
W
1
8
t
FUSE
20A
MAIN
RELAY
J
rn
W
I
fJ
RESISTOR
Dt
J
M
BLOWER
MOTOR
W
c
J
c
J
C
r
BvM
LW
LY
I
MICRO
SWITCH
B
AC404A
Fig
AC
39
Circuit
Diagram
of
Air
Conditioner
I
AC
25
Page 534 of 548
Air
Conditioning
BLOWER
MOTOR
DIAGNOSES
I
Blower
motor
inoperative
I
Check
20
ampere
fuse
in
air
conditioner
harness
Fuse
blown
Fuse
OK
Locate
short
circuited
spot
and
repair
or
replace
faulty
parts
Ground
one
of
lead
wires
Black
blue
3
speed
Black
white
2
speed
Black
yellow
l
speed
1eading
to
fan
switch
Blower
runs
Blower
does
not
run
Check
ground
circuit
and
lead
wire
con
oeetion
When
no
problem
is
found
replace
blower
switch
Ground
black
wire
of
blower
motor
i
Blower
runs
Blower
does
not
run
Check
resistor
for
connection
When
no
problem
is
found
replace
resistor
Connect
12
volt
test
light
to
white
wire
leading
to
blower
motor
Light
ON
Light
OFF
Check
lead
wire
for
connection
When
no
problem
is
found
replace
blower
motor
Check
for
presence
of
voltage
at
main
relay
No
Yes
Check
for
presence
of
voltage
at
air
conditioner
harness
Check
lead
wire
for
connection
When
no
problem
is
found
replace
relay
AC
33
Page 536 of 548
Air
Conditioning
COMPRESSOR
CLUTCH
DIAGNOSES
Compressor
clutch
is
not
engaged
Check
20
arnpere
fuse
in
air
conditioner
harness
Fuse
blown
Fuse
OK
Locate
short
circuited
spot
and
repair
or
replace
damaged
parts
Connect
12
volt
test
light
to
compressor
clutch
lead
wire
Ground
the
other
end
of
test
light
Set
air
control
lever
to
A
C
posi
tion
Light
ON
Light
OFF
I
Check
low
pressure
switch
for
continuity
L
H
drive
only
Check
lead
wire
and
ground
wire
of
compres
sor
clutch
for
connection
When
there
is
nothing
wrong
with
them
replace
compressor
clutch
No
I
Yes
Measure
pressure
in
system
If
there
is
a
leak
service
system
If
pressure
is
normal
check
low
pressure
switch
as
a
part
reo
place
if
necessary
Connect
12
volt
test
light
to
terminal
of
blue
green
wire
leading
to
thermostat
Ground
the
other
end
of
test
light
Light
ON
Light
OFF
Check
ground
circuit
and
make
sure
of
proper
connection
Further
check
lead
wire
connection
and
when
no
problem
is
found
replace
air
conditioner
harness
or
main
harness
Connect
12
volt
test
light
to
blue
white
wire
of
microswitch
Ground
the
other
end
of
test
light
I
Light
ON
I
Light
OFF
I
Check
lead
wire
connection
When
no
problem
is
found
replace
thermostat
Check
for
current
flow
in
lead
wire
to
main
relay
Yes
I
I
No
Check
lead
wire
for
connection
When
no
problem
is
found
replace
microswitch
or
main
relay
Check
power
supply
AC
35
