UNIT ASSEMBLY AND SETUP
CHARGING INSTRUCTIONS
Batteries have already been installed in units and are ready for immediate use. We recommend charging the
unit upon receiving, so you will have maximum power for your jumping needs.
Note:
12/24 Volt models will only charge when common connector with handle is plugged into the
12 Volt connector.
After verifying unit is in 12 Volt position, follow instructions below.
1. Unwrap AC power cord from unit and plug into 110 AC outlet.
2. Charger will read internal battery status and apply the proper charge needed within 3-5 seconds.
3. When batteries are fully charged the amp gauge (left gauge) will flicker between 0-2 Amps.
4. Unplug and rewrap AC power cord.
5. Unit is ready for use.
VEHICLE HARNESS (FMB1224 MODEL ONLY)
Two 25 ft. #4 gauge cables are provided with FMB1224 for optional charging of unit from vehicle in which the
box unit is mounted.
CONNECTING VEHICLE HARNESS
1. Cables must run from box unit into engine compartment area.
2. Do not allow cable to touch any moving parts of engine.
3. Positive cable (red band) connects to alternator 12 Volt output.
4. Negative cable (black band) connects to engine ground (any non-moving part of the engine block or heavy
gauge metal part of frame).
5. Excess cable can be tied off or pulled into box unit.
USING VEHICLE HARNESS
When vehicle engine is running, alternator will charge box unit. Running vehicle while FMB1224 is connected in
24 Volt mode will not harm vehicle, but it will only allow alternator to charge the #1 battery in the box unit.
For
full charging of all batteries insure FMB1224 is in 12 Volt mode.
