10.
Now start the vehicle with the good battery and run
the engine for a while.
11.
Try to start the vehicle with the dead battery.
If it won't start after a few tries, it probably needs
service.
12.
Remove the cables in reverse order to prevent
electrical shorting. Take care that they don't touch
each other or any other metal.
U
GOOD
BATTERY
DEAD
BATTERY
Remove cables in this order.