Mazda CX-52017 Owner's Manual page 522

If Trouble Arises
Battery Runs Out
CAUTION
Use only a 12 V booster system. You can damage a 12 V starter, ignition system, and other
electrical parts beyond repair with a 24 V power supply (two 12 V batteries in series or a 24 V
motor generator set).
Connect cables in numerical order
and disconnect in reverse order.
Jumper cables
1. Remove the battery cover.
2. Make sure the booster battery is 12 V
and that its negative terminal is
grounded.
3. If the booster battery is in another
vehicle, do not allow both vehicles to
touch. Turn off the engine of the
vehicle with the booster battery and all
unnecessary electrical loads in both
vehicles.
4. Connect the jumper cables in the exact
sequence as in the illustration.
7-14
Booster battery
Discharged battery
Connect one end of a cable to the

positive terminal on the discharged
battery (1).
Attach the other end to the positive

terminal on the booster battery (2).
Connect one end of the other cable

to the negative terminal of the
booster battery (3).
Connect the other end to the ground

point indicated in the illustration
away from the discharged battery
(4).
5. Start the engine of the booster vehicle
and run it a few minutes. Then start the
engine of the other vehicle.
6. When finished, carefully disconnect
the cables in the reverse order
described in the illustration.
7. If the battery cover has been removed,
install it in the reverse order of
removal.