Schumacher Electric DSR104 Owner's Manual page 9

Jump Starting a Vehicle Engine
8.4
IMPORTANT: Using the booster without a battery installed in the vehicle will damage the vehicle's
electrical system.
IMPORTANT: Do not use the booster while charging its internal battery.
WARNING! A SPARK NEAR THE BATTERY MAY CAUSE A BATTERY EXPLOSION. TO REDUCE
THE RISK OF A SPARK NEAR THE BATTERY:
1. Turn the vehicle's ignition OFF before making cable connections.
2. Position the DC cables to reduce the risk of damage by the hood, door and moving or hot engine parts.
NOTE: If it is necessary to close the hood during the jump starting process, ensure that the hood does
not touch the battery clips or cut the insulation of the cables.
3. Stay clear of fan blades, belts, pulleys and other parts that can cause injury.
4. Check the polarity of the battery posts. The POSITIVE (POS, P, +) battery post usually has a larger
diameter than the NEGATIVE (NEG, N, -) post.
5. If the batteries are side by side: Connect the red clamp (+) to the positive terminal (+) of the battery,
and then connect the blue clamp (-) to the negative (-) terminal of the other battery.
6. If the batteries are on both sides of the vehicle: Determine which post of the battery is grounded
(connected) to the chassis. If the negative post is grounded to the chassis (as in most vehicles), see
step A. If the positive post is grounded to the chassis, see step B.
For a negative-grounded vehicle, connect the POSITIVE (RED) clip from the booster to the POSITIVE
g.
(POS, P, +) ungrounded post of the battery. Connect the NEGATIVE (BLUE) clip to the vehicle
chassis or engine block away from the battery. Do not connect the clip to the carburetor, fuel lines or
sheet-metal body parts. Connect to a heavy gauge metal part of the frame or engine block.
For a positive-grounded vehicle, connect the NEGATIVE (BLUE) clip from the booster to the
h.
NEGATIVE (NEG, N, -) ungrounded post of the battery. Connect the POSITIVE (RED) clip to the
vehicle chassis or engine block away from the battery. Do not connect the clip to the carburetor, fuel
lines or sheet-metal body parts. Connect to a heavy gauge metal part of the frame or engine block.
9. Connect the output voltage selector
12V
10. Crank the engine. If the engine does not start within 8-10 seconds, stop cranking and wait at least 3
minutes before attempting to start the vehicle again.
• To allow the voltage of the booster battery to build up again.
• To allow the renewal of gases inside the battery.
• To allow the internal components of the battery to cool down.
If you do not wait and/or the starting attempt is too long, you risk losing power, you reduce your starting
possibilities by the second attempt and you risk melting the fuse inside.
IMPORTANT:
• Never connect the booster to a battery or starter which is in short-circuit. The internal fuse will blow.
• Make sure clamps are connected correctly.
• Never disconnect the booster while engine running when there is no battery in the vehicle or when the
vehicle's battery is at 0 volt. This may damage the alternator.
11. After the engine starts, disconnect the output voltage selector.
Then, disconnect the blue clamp (-) and the red clamp, (+) in that order.
12. Return the cables and clamps to their support posts.
13. Immediately recharge the booster.
24V
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