Cadillac 60 Series 1963 Shop Manual page 313

12-32
ELECTRICAL SYSTEM
POINT OPENING
(LOWER POINTS
JUST TOUCHING)
UPPER CONTACT ARM
(BEND TO ADJUST POINT
OPENING)
AIR GAP
(CHECK WITH POINTS
JUST TOUCHING)
Fig. 12-49 Checking Voltage Regulator Point Opening
NOTE: Do not attempt to check regulator
except when mounted on car and well grounded.
Operation without ground will destroy regulator.
43. Accessory Ground Circuit Tests
The headlights and accessories are usually
grounded to the body or sheet metal of the car.
If there is not a good ground circuit between
the car body and the engine, there will be a
voltage drop from the car body to the engine
when the lights and accessories are turned on.
This condition will result in light flare-up.
NOTE: This test must be made with the
engine off.
1. Turn voltmeter selector switch to 4 volt
position.
Fig. 12-51 Checking Field Relay Air Gap
2. Connect one voltmeter lead to a ground on
car body and the other lead to a ground on engine.
3. Turn on all lights and accessories, then
note voltmeter reading. This should not exceed
.1 volt.
4. If voltmeter reading exceeds .1 volt, test
voltage drop at ground strap connection between
engine and car body, and tighten connections or
replace strap.
44. Primary Wiring Insulation Test
This test, using a megohm tester, is used
to detect intermittent short circuits. The megohm
test applies approximately 500 volts to the circuit
and will show intermittent and "damp weather"
shorts that cannot be found by any other methods.
TURN NUT TO
SET AIR GAP
AIR GAP
(LOWER POINTS
JUST TOUCHING)
Fig. 12-50 Checking Voltage Regulator Air Gap Fig. 12-52 Adjusting Field Relay Point Opening