Operating Instructions: Charging Battery In Vehicle - Schumacher SF-51A-PE Owner's Manual

1. Check polarity of battery posts. Battery case will be marked
by each post: POSITIVE (POS, P, +) and NEGATIVE (NEG, N,
-). NOTE: The positive battery post usually has a larger diam-
eter than the negative post.
2. Attach a 24-inch long (or longer) 6-gauge (AWG) insulated
battery cable to NEGATIVE (NEG, N, -) battery post.
3. Connect POSITIVE (RED) charger clip to POSITIVE (POS, P,
+) post battery. Rock clip back and forth to make good con-
nection.
4. Position yourself and free end of 24 inch cable as far away
from battery as possible. Then connect NEGATIVE (BLACK)
charger clip to free end of cable. WARNING: Do not face
battery when making final connection. Rock clip back and forth
to make a good connection.
FIGURE 7 shows the connection.
5. Plug charger AC cord into 120 volt grounded outlet.
6. Select auto or manual charging, see charge controls.
7. When battery is fully charged, unplug charger from AC
power source.

OPERATING INSTRUCTIONS: CHARGING BATTERY IN VEHICLE

When charging battery in vehicle, take care to determine the battery type and which pole is grounded. To reduce risk of a spark near battery,
follow these steps when battery is inside vehicle. WARNING: A spark near the battery may cause battery explosion.
1. Position AC power cord and DC charging cords to reduce risk
of damage by hood, door, or moving engine parts.
2. Stay clear of fan blades, belts, pulleys, and other parts that
can cause injury.
3. Check polarity of battery posts. Battery case will be marked
by each post: POSITIVE (POS, P, +) and NEGATIVE (NEG, N,
-). NOTE: The positive battery post usually has a larger diam-
eter than the negative post.
4. Determine which post of battery is grounded (connected) to
chassis. NOTE: The negative post is normally grounded.
NEGATIVE GROUNDED POST
5A. For negative-grounded vehicle, connect POSITIVE (RED) clip
from battery charger to POSITIVE (POS, P, +) ungrounded
post of battery. Connect NEGATIVE (BLACK) clip to vehicle
chassis or engine block away from battery. Connect to a
heavy gage metal part of the frame or engine block.
WARNING: Do not connect clip to carburetor, fuel lines, or sheet-
metal body parts. NOTE: Attach clips to battery post and twist or
rock back an forth several times to make a good connection. This
tends to keep clips from slipping off terminals and helps to reduce
risk of sparking.
FIGURE 6 shows connections for a negative-grounded battery.
POSITIVE GROUNDED POST
5B. For positive-grounded vehicle, connect NEGATIVE (BLACK)
clip from battery charger to NEGATIVE (NEG, N, -) un-
grounded post of battery. Connect POSITIVE (RED) clip to
vehicle chassis or engine block away from battery. Connect
to a heavy gauge metal part of the frame or engine block.
POSITIVE
+ -
BATTERY
24", 6 GUAGE
CABLE
FIGURE 7 CONNECT NEGATIVE BATTERY CLIP
TO 24 INCH CABLE END
8. When battery is fully charged and charger is unplugged,
(1) remove clip from end of Negative end of cable, and (2)
remove clip from Positive battery post, in that order.
9. Clean and store battery charger.
GROUND
(NEG)
FIGURE 6 CONNECTION TO NEGATIVE
GROUNDED BATTERY
6. Plug charger AC cord into a grounded 120 volt grounded out-
let.
7. Select either automatic or manual, see charger controls.
8. When battery is fully charged, unplug charger from AC power
source.
9. Remove charger clips from (1) chassis and (2) battery post,
in that order.
10. Clean and store battery charger.
NOTE: Charger will hum when clamps are removed from bat-
tery and power cord is still plugged into electrical outlet.
5
NEGATIVE
BATTERY CHARGER
POWER
CORD
TO GROUNDED
POWER OUTLET