1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

6 - 26 ELECTRICAL SYSTEM
7. Turn the condenser switch to the " Micro-farad". The
meter should read 20 to 25 microfarads for both six and
eight cylinder engines.
8. Turn the condenser switch to the "Meg-ohm" position.
Meter should now read in the blue bar at left side
marked "MEG" for satisfactory condenser insulation.
If the meter reads in the red bar or over to the extreme
right, replace the condenser.
NOTE: When making the above checks, the condenser
should be at operating temperatures.
COIL
The ignition coil used is Auto-Lite CR-6012-A; the coil
provides a means of stepping up the six volt primary current
to high voltage necessary to jump the spark plug gap. The
primary winding of the coil is connected to the battery
through the distributor contact points. The secondary winding
of the coil is connected to the spark plug through the
rotor and distributor cap.
COIL TEST:
1. Calibrate Coil Breaker Unit.
2. Disconnect the primary ignition lead at the distributor
and the high tension lead from the coil. Connect red lead of
Coil Breaker Unit to the primary wire disconnected from
the distributor primary terminal, and the ground lead to the
battery starter terminal, Figure 25.
3. With ignition switch on, turn Master Control Switch to
"Coil Set" and adjust Coil Set Regulator knob until meter
reads on proper "Set Line".
4. Turn switch to "Coil Test" position. The meter re ad i n g
must be within the "Good C oil" band and hold steady to
denote a good coil. A reading outside the "Good Coil"
area or an erratic reading of 3 to 5 divisions inside "Good
Coil" band indicates a bad coil.
5. Turn tester knob to milliamp position (center line) and
turn ignition switch "OFF".
COIL SECONDARY RESISTANCE CHECK:
1. Calibrate Coil Breaker Unit by connecting the ground
(Blue) and positive primary (red insulator) test leads together.
2. Turn master switch "On".
3. Turn tester switch to Dwell-Ohm position, and adjust
Dwell-Ohm Regulator until meter reads on "Set" line.
4. After calibrating the Test Unit, separate the positive
primary and ground test leads, c o n n e c t the positive
primary lead to the primary ignition wire which was
removed from the distributor.
5. Insert the short test lead into the high tension post of the
coil and connect the ground lead directly to the short test
lead.
6. Meter should read from 2,000 to 10,000 OHM's resistance. If
the meter reads outside this range, replace coil.
Internal repairs cannot be made to the coils; in case of a
defective coil, it is necessary to replace the complete coil.
HEADLAMPS
FIGURE 25
The headlamps are the "Sealed Beam" type, designed so
that the bulb, reflector, lens, and the gasket are assembled in
one securely sealed unit making them dust and moisture
free,
Figure 26.