Hudson 1948 - 1952, Service Manual

Page: 140 / 333

6 - 4 ELECTRICAL SYSTEM
ELECTRICAL SYSTEM
The 1952 "B" Series Hudsons use a positive grounded 6
volt electrical system employing a 6 volt, 100 ampere hour
storage battery, an externally regulated shunt wound gener-
ator, and a three unit voltage regulator.
The starting system uses a 6 volt starter motor and left
hand inboard type Bendix drive, on cars not e quipped with
the Hydra-Matic Drive, and a right hand outboard Bendix
drive with cars e quipped with the Hydra-Matic Drive. The
starter motor is energized by the battery through a solenoid
switch mounted on the left hand fender side shield. Turning
ignition key to the extreme right activates the solenoid.
The lighting system uses sealed beam headlamps and is
protected by a circuit breaker on the light switch. A foot
operated dimmer switch controls the headlamp beam.
Complete wiring diagram is shown in Figure 10.
BATTERY
The battery used is a National, Model 2LS-100, 51 plate
6 volt, 100 ampere hour capacity storage battery.
Electrolyte level in the battery should be at the bottom of
the square in filler cap opening. Only pure distilled water
should be added to the battery. Electrolyte level should be
checked at chassis lubrication periods and oftener during
hot weather. Battery terminals should be kept free from
corrosion and cable terminals should be tight.
FIGURE 1
BATTERY TEST
HYDROMETER:
Under normal conditions a hydrometer reading of the
specific gravity of each cell will determine the state of
charge, Figure 1. A specific gravity of 1.270 indicates a fully
charged battery. A specific gravity of 1.130 indicates a fully
discharged battery. If specific gravity varies more than 25
points between cells, recharge and retest or test under load.
(See " Load Test").
VOLTMETER:
A battery that fails to perform properly of to r charging
should be tested with a voltmeter. Each cell should show
two volts or over under no load, and the voltage across the
terminal posts should be 6 volts or over.
If these values cannot be obtained the battery should be
replaced.
FIGURE 2
Load TEST:
A load test should be made to eliminate possibility of a
weak cell. Use Battery-Starter tester, Figure 2, or a standard
cell tester with