Using Your Battery Charger
Forbest results from your battery charger, learnto use it properly. This section tells how to set the controls and how
to charge a battery in or outof the vehicle.

Setting the Controls

SELECTOR SWITCHES:
A2-way switch is used to select the 2-AMP or the
10-AMP charge rate.
AMMETER:
The AMMETER indicates the measured amount ofamperes
being drawn by the battery. When you first start charging a
battery, the reading willbe high, with theneedle near10 using
the 10 amp charging rate. Asthe battery charges, the needle
willfall to about 4 or 5 amps, indicatingacharged battery.
10AMP 2AMP
Atthe 2 amp charging rate, as the battery charges the
needle willfall to about 3/4 to 1amp indicating a charged
battery.
The percent of charge scale is intended as a visual aid to
help simplify reading the state ofcharge of the battery. The
meter isscaled for use with the 10 amp charge rate only.
Forthe 2 amp charge rate use the red triangle. The percent
of charge is based on current drawn by the battery. Forthis
reason accuracy will vary with the size and battery type.
DCAMPS
CHARGE %100 75 50 25 0
0 2 4 6 8 10 12

Charging Your Battery

Charging a battery in the vehicle:
1. Arrange the power cord and charging leads carefully
to avoid damage that could be caused by the hood,
door, or moving engine parts.
2. Keep clear of fan blades, belts, pulleys, and other
parts that can cause injury.
3. Check the polarity of the battery posts es indicated
on the battery case: POSITIVE (POS, P, or +) and
NEGATIVE (NEG. N or-). NOTE: The positive post
on top-post batteries is usually larger than the
negative post.
4. Identify which battery post is ground or connected
to the chassis. THE NEGATIVE POST IS
NORMALLY THE ONE THAT IS GROUNDED.
5. To charge a negative grounded post system:
Connect the red (POSITIVE) battery charger clamp
to the ungrounded POSITIVE (POS, P, +) post of the
battery, Then connect the black (NEGATIVE) clamp
to a heavy, unpainted metal part of the chassis or
engine block, away fromthe battery. Do not connect
clamp to carburetor, fuel lines, or sheet metal parts.
To charge a poslUve grounded post system:
Connect the black (NEGATIVE) battery charger
clamp to the NEGATIVE (NEG, N, -) ungrounded
post ofthe battery. Then connect the red
(POSITIVE) clamp to a heavy, unpainted metal part
of the chassis or engine block. Do not connect
clamp to carburetor, fuel lines, or sheet metal parts.
IMPORTANT: Wear safety glasses and face away
from the battery while making connections.
6
NEGATIVEGROUNDEDSYSTEM