Cadillac 60 Series 1963 Shop Manual page 290

ELECTRICAL SYSTEM
12-9
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Fig. 12-8 Battery Cable to Starter Test
a. Battery to Solenoid Switch .2 Volt
b. Across Solenoid Battery Terminal
and Solenoid Motor Terminal .2 Volt
c. Solenoid Switch to Starter Terminal Zero
b. Ground Circuit Test
1. Turn voltmeter selector switch of Battery
Starter Tester to 4 volt position.
2. Connect test leads as shown in Fig. 12-9.
3. Connect starter solenoid "clicker" switch.
4. Connect negative voltmeter lead to a clean
spot at center of negative battery post, not to the
cable clamp.
5. Connect positive voltmeter lead to the start-
ing motor through bolt.
6. With starter motor cranking engine, voltage
drop should not exceed .1 volt. A reading of more
than . 1 volt is usually an indication of resistance
due to loose, dirty, or corroded connections.
7. Connect primary lead of distributor to coil.
12. Starter Motor Amperage
Draw Test
This test determines how much current is drawn
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Thru V
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Ammeter Voltmeter
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Fig. 12-9 Ground Circuit Test
Fig. 12-10 Amperage Draw Test
from the battery in cranking the engine. Proceed
as follows:
NOTE: The battery should be fully charged.
1. Turn Battery Starter Tester control knob to
"Off" position.
2. Turn voltmeter knob to 16 volt position.
3. Connect test leads as shown in Fig. 12-10.
4. Connect solenoid "clicker" switch from bat-
tery to starter solenoid.
5. Disconnect primary lead of distributor from
coil so motor will not start.
CAUTION: Do not remove high tension lead
from coil center for this purpose, as damage
may be caused by internal arcing.
6. Close starter motor "clicker" switch to
crank engine, note exact reading on voltmeter.
7. Open starter motor switch. Turn Battery
Tester control knob clockwise until the voltmeter
reads exactly as in step 6.
CAUTION: Do not turn handle counterclock-
wise from the locked position as this will con-
nect ammeter directly across battery causing a
direct short.
8. Read test ammeter for starter motor amper-
age draw. This should be approximately 130 to 165
amps. If amperage draw is higher than specified,
various conditions within the starter could cause
the trouble, such as: armature touching field
coils, grounded field coil, worn starter bushings,
a bent armature shaft, excessive resistance in the
circuit, or a low battery.
9. Disconnect test leads, and connect distrib-
utor lead to coil.
13. Checking Starter Motor
Pinion Clearance
1. Remove starter motor from car as described
in Note 17.