Cadillac 60 Series 1963 Shop Manual page 358

ELECTRICAL SYSTEM
12-77
b. Electrical Tests
1. Turn ignition switch on. Do not start engine.
2. Using a test lamp, ground one test lamp lead,
put slide switch in "lock" position and allow to
come back to " o n " . Touch other end to terminal
#1, Fig. 12-95, and if lamp fails to light, check
for blown fuse, or defective brake release switch.
3. Ground one test lamp lead and touch other
to terminal ft2, and then push slide switch to
"lock" and allow to come back to " o n " . Lamp
should remain lit throughout the major part of
this sequence.
4. Switch lead from terminal #2 to terminal
#3, Fig. 12-96, and again push slide switch to
"lock" and allow to come back to " o n " . Lamp
should light when slide switch reaches "lock"
position and then should go out when it returns
to "on".
NOTE: If switch fails either of the above
tests, it should be replaced.
Grounded Test Lamp Lead
m
Fig. 12-96 Testing for Current at #3 Terminal
the accelerator linkage. Motor should move mag-
net to wide open throttle position when contacts
are free.
6. Move contact arm to touch grounding point
on motor side of magnet. Motor should rotate
drive screw and open the throttle through the
accelerator linkage.
5. Turn ignition switch "off".
c. Checking Motor Operation
1. Turn ignition switch " o n " and slide switch
" o n " . Do not start engine.
2. Remove four screws securing power unit
cover and remove cover.
3. Check accelerator linkage adjustment, as
described in Note 100.
4. Move locking arm against magnet and press
down on armature plate to latch unit, simulating
automatic control.
5. Move contact arm to touch grounding point
on locking arm side of magnet. Motor should
rotate drive screw and close the throttle through
Fig. 12-95 Testing for Current at #1 Terminal
7. If motor will not open or close throttle
through accelerator linkage, motor may be bind-
ing. Check alignment of motor with housing. To
check motor for binding, loosen motor from hous-
ing without disconnecting motor leads and dis-
engage motor shaft from drive screw. Move
contact arm against grounding point on motor side
of magnet assembly to check reverse operation,
and against grounding point on locking arm side
of magnet assembly to check forward operation.
If motor does not run free, replace motor. If
motor does run free, stall test motor as de-
scribed in Section " d " of this note.
8. The drive screw or carburetor linkage may
also be binding. To check drive screw for binding,
disengage motor shaft from drive screw, insert
screwdriver in slotted end of drive screw, and
check for free rotation. If drive screw does not
rotate freely, it is defective and should be r e -
placed. If motor and drive screw operate satis-
factorily, then adjust carburetor linkage.
9. Turn ignition switch "off", and replace
power unit cover.
d. Motor Stall Test
1. Disconnect multiple electric connector at
front of power unit.
2. Remove four screws securing power unit
cover to housing and remove cover.
3. Connect red lead of an ammeter tester to
positive battery terminal.