Schumacher SF-51A-PE Operating Instructions Charging Battery in Vehicle, Negative Grounded Post

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.

POSITIVENEGATIVE

BATTERYCHARGER

BATTERY + -

24", 6 GUAGE	POWER
	CORD
CABLE

TO GROUNDED

POWER OUTLET

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.

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.

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.

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