Mustang And Cougar - Ford COUGAR 1968 Shop Manual

16-26 GROUP 16
. -
Ventilating, Heating, And Accessories
IF
NOT OK
Connect vacuum lines tn proper
control assembly fitting, if required.
Replace control assembly, i f required.
Check doors for proper operation.
If no vacuum is present at the A/C
heat door motor, check the door op-
eration by hand for a binding or ob-
structed condition.
If vacuum is present at the reheat
door motor, outside recirculating door
motor and defrost door motor,
check the operation of the. door by
hand for a binding or obstructed
condition.
IF
NOT OK
Correct cause of obstruction or bind
condition (if required). Lubricate door
edges and plenum chamber contact
surfaces with Lubriplate, Lubricate
door pivot points. If dodi was not ob-
structed or binding, replace the ap-
plicable door motor. Check the doors
and control system for proper opera-
tion.
FUNCTIONAL CONTROL (LEFT)
LEVER DOES N O T OPERATE
A/C DOORS PROPERLY IN
HEAT POSITION-MUSTANG
A N D C O U G A R
Verify the complaint. Apply parking
brakes. Position transmission lever in
neutral or park position. Operate the
engine at 1500 RPM. Position func-
tional control lever in the fresh posi-
tion and the blower at high speed.
Check the position of the doors to see
if they are as follows:
'
1. Outside-recirculating door-open
to outside.
2. A/C heat door-- closed.
3. A/C-defrost door-open.
*
'
4. Reheat door-open.
If the doors are not in the positions
indicated above, check for specified
vacuum (14 inch' HG) with the- vac-
uum leak probe connected between the
'
vacuum tank line (black) and the vac-
uum.tank. If vacuum is not to specifi-
cation at these locations, check for
,
vacuum :component leakage between
the connector on the engine; check
valve, vacuum supply tank, and vac-
uum outlet line (black) at the control
assembly.
*
;
'
.
IF NOT OK
Repair or replace'(as required) faulty
component causing vacuum leakage.
Check the door operation.
Check the door positions. If a door
is not positioned as indicated above,
check for vacuum at the applicable
vacuum motor.
No vacuum should be present at the
outside-recircu lating door motor. If
vacuum is present, check for improper
(crossed) or leaking hose connections
at the control assembly.
Vacuum should be present at the
heat door motor, defrost door motor
and the reheat door motor. If no vac-
uum is prksent, check for improper
(crossed) or leaking hose connections
at the T-connector (if so equipped)
and at the control assembly. If hose
connections are installed properly the
control assembly is faulty and should
be replaced.
IF NOT OK
Connect vacuum lines to proper
control assembly fitting, if required.
Replace control assembly, i f required.
Check doors for proper operation.
If no vacuum is present at the out-
side-recircul'ating door motor, check
the door operation by hand for a bind-
ing or obstructed condition.
If vacuum is present at the A/C-heat
door motor, A/C-defrost door motor
and the reheat door motor, check
the operation of the door by hand
for a binding or obstructed condition.
IF
NOT OK
Correct the cause of the obstruction
or bind condition (if required). Lubri-
cate door edges A d plenum chamber
contact surfaces with Lubriplate. Lubri-
cate the door pivot points. If the door
was not obstructed or binding. replace
the applicable door motor. Check the
doors and control system for proper
operation.
FUNCTIONAL CONTROL (LEFT)
LEVER DOES ' N O T OPERATE
A/C DOORS PROPERLY IN
*
'
DEFROST POSITION-MUSTANG
A N D COUGAR
/ '
-
..
Verify the complaint. Apply parking
brakes..Position transmission lever in
neutra!.or park position. Operate the
engine at 1500 'RPM. Position func-
tional control lever, in the fresh 'posi-
tion and the blower on high speed.
.
Check the position of, the doors to see
if they are as follows:
I. Outside-recirculating door-open
to outside.
.
2. A/C-heat door-closed.
3. A/C-defrost door-closed.
4. Reheat door-closed.
If the doors are not in the position
indicated above, check for the specified
vacuum (14 inch HG) with the vac-
uum leak probe connected between the
vacuum tank line (black) and the vac-
uum tank. Also, check for the specified
vacuuy (14 inch HG) at the A/C-heat
door vacuum motor with the tempera-
ture control (center) lever in the warm
position. If vacuum 'is not to specifi-
cation at these locations, check for
vacuum component leakage between
the connector on the engine, check
valve, vacuum supply tank, and vac-
uum outlet line (black) at the control
assembly
.
IF
NOT OK
Repair or replace (as required) faulty
component causing vacuum leakage.
Check the door operation.
Check the door positions. If a door
is not positioned as indicated above,
check for vacuum at the applicable
vacuum motor.
No vacuum should be present at the
outside-recirculating door motor, A/C-
defrost door motor and the reheat
door motor. I f vacuum is present,
check for improper (crossed) or leak-
ing hose connections at the control
assembly.
Vacuum should be present at the heat
door motor. I f no vacuum is present,
check for improper (crossed) or leak-
ing hose connections at the control
assembly. If hose connections are in-
stalled prdperly7 the control assembly
is faulty and should be replaced.
IF
NOT OK
'
Connect the vacuym lines to the pro-
per control astembly fitting, if required.
Replace the control assembly, if requir-
ed. Check the' doors' for proper
.
.
operation.
.
.
IF
OK
.
T i
.
If no vacuum is present at the out-
side-recirculating door motor, A/C-
defrost door motor or the reheat door
motor, check the door operation by
hand for a binding or obstructed
condition.
If vacuum is present at the heat door
motor, check the operation of the door
by hand for a binding or obstructed
condition.