Installation Of Generator; Accessory Ground Circuit Test; Primary Wiring Insulation Test - Cadillac 54-6219 1954 Shop Manual

11-13
ENGINE ELECTRICAL
7. Install bearing retainer plate and gasket on
drive end frame and install screws,
8. Install drive end frame assembly on shaft
and slide on thick spacer washer.
9. Install key in keyway of armature shaft and
install generator ventilating fan and pulley.
10. Install lock washer and nut on end of arma
ture shaft and tighten to 70 ft. lbs. torque.
11, Install armature and driveendframeassem
bly in generator frame, holding brushes out to clear
commutator,
12, Position generator frame dowel pin withhole
in drive end frame.
13. Inspect brushes to see that they are seated
correctly.
14. Install commutator end frame on generator
frame, aligning dowel pin with hole.
15. Install and tighten two through bolts.
21
Installation of Generator
1. Install generator on right exhaust manifold
bracket and loosely install two mounting screws and
generator adjusting strap clamp screw.
2, Install generator belt
3. Connect field and armature wires.
4. Connect battery,
5. Momentarily connect a jumper lead on regu
lator, across
"Gen" and "Bat" terminals before
starting engine, to assure correct polarity.
22
Accessory Ground Circuit Test
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 re
sult in light flare-up or could cause reverse genera
tor polarity.
NOTE: This test must be made with engine off.
1. Turn the voltmeter selector switch to the 4
volt position.
car body and the other lead to ground on the engine.
3, Turn on all lights and accessories, then note
the voltmeter reading. This should not exceed .1
volt.
4, If the voltmeter reading exceeds .1 volt, test
the voltage drop at the ground strap connection
between the engine and car body.
23 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 other methods.
1. Disconnect the positive battery cable from its
battery post.
2. Turn off all switches, and close all doors to
prevent operation of courtesy
lights from door
switches.
3. Turn the tester master switch "ON".
4. Connect the condenser tester leads together
and
turn
switch to megohm position. Adjust meter
to "SET LINE" with regulator.
5. Touch battery cable to its battery post to
wind clock or disconnect clock for safety.
6, Connect condenser
leads as shown in Fig.
11-15. Meter should read in Blue Meg band 1! in
sulation in primary circuit is normal.
7. If tester reads out of the blue band after dis
connecting the clock, the short
in the primary
2. Connect one voltmeter lead to ground on the
Fig. 11-15 Primary Wiring lest