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ELECTRICAL SYSTEM.
The wiring diagram Fig. 16 shows the general arrangement of all the electrical circuits, together with all the units
in correct relation to the position in which they are found.
Regular inspection of all electrical connections avoids failures in the electrical system. When tracing any one
particular circuit, note that the wires have different colored tracers to identify each individual wire.
BATTERY.
The battery is of 6-volt, 15-plate, 100-ampere hour capacity. It is located under the hood on a bracket attached to
the right hand side rail of the frame and held firmly on the base with a hold-down frame and two studs and wing
nuts.
Check the battery once a week with a hydrometer and at the same time check the electrolyte level in each cell;
add distilled water to maintain the solution level 3/8" (9.52 mm.) above the plates. Avoid overfilling and do not
fail to replace the filler caps and tighten securely. If the plates are exposed for any length of time, they can be
seriously damaged, therefore, it is important to add enough water to keep the plates covered.
A hydrometer reading of 1.285 to 1.300 indicates that the battery is fully charged. Should the reading fall below
1.225, it will be necessary to recharge the battery or else use the lights and battery sparingly until the battery has
had an opportunity to build itself up again.
Coating the battery terminals with light grease will protect them from corrosion. The battery must be held
securely in place, otherwise it may shift, resulting in loose connections, broken cells or other trouble. Should a
sufficiently charged battery fail to crank the engine, it is probably due to loose or corroded terminals or ground
connections. The terminal connections should be removed and all corrosion cleaned from them, as well as the
posts, to insure proper contact. Also clean and tighten the battery ground connection. A strong solution of baking
soda and water may best be used for removal of the corrosion.
Clean and tighten the engine ground strap located on the right side of the engine as shown in Fig. 10. This strap is
necessary because of the rubber engine mountings.
FUEL GAUGE.
The fuel gauge circuit is composed of the indicating unit, mounted on the instrument panel, and the fuel tank unit,
connected by a single wire through the ignition switch.
Should the gauge fail to register, check all wire connections to be sure they are tight and clean; also be sure both
units are well grounded. If, after this check, the gauge does not indicate properly, remove the wire from the tank
unit and connect it to a new tank unit which must be grounded to the tank or frame for test. Turn the ignition
switch “ON” and move the float arm through its range of travel, watching the dash unit to determine if it indicates
correctly. If it fails to do so the trouble is probably in the dash unit and it should be replaced.
Should a new tank unit be unavailable for this test, disconnect tank unit wire at the instrument panel gauge.
Connect one lead of a 6 V, 1 CP test light to the instrument panel unit terminal and with the ignition switch “ON”
ground the other lead. If the unit is operating correctly the pointer will move approximately three-quarters across
the dial.
Do not attempt to repair either unit; replacement is the only procedure.
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