Hummer H24 User Manual page 6

JUMP STARTING A VEHICLE:
Before jump starting the vehicle, ensure that the battery level of the Hummer is
sufficient for jump starting (i.e over THREE lights).
JUMP STARTING STEPS:
1. Before jump starting the vehicle, please check below carefully.
Make sure the (12V / 24V Switch) is set on the right voltage mode: (12V Mode) for 12V
vehicle while (24V Mode) for 24V vehicle.
Make sure the battery level of Hummer is above 60% (At least 3 indicator lights stay ON).
Attention:
When jump starting 12 vehicle, never set the (12V/24V Switch) to (24V Mode) and never
press the (BOOST Button) when it is on (24V Mode).
2. Connect the jumper cable to the drained battery of the vehicle.
Connect RED clamp to the positive "+" terminal
and BLACK clamp to the negative "-" terminal.
12V OFF 24 V
12V OFF 24 V
For 24V
For 12V
Red
Black