Jeep Grand Cherokee 2012, Owner'S Manual, Page: 574 / 688

CAUTION!
Failure to follow these procedures could result in
damage to the charging system of the booster vehicle
or the discharged vehicle.
1. Connect the positive (+) end of the jumper cable to the
remote positive
(+)
post of the discharged vehicle.
2. Connect the opposite end of the positive (+) jumper
cable to the positive (+) post of the booster battery.
3. Connect the negative end (-) of the jumper cable to the
negative
(-)
post of the booster battery.
4. Connect the opposite end of the negative (-) jumper
cable to the remote negative (-) post of the vehicle with
the discharged battery.
WARNING!
Do not connect the cable to the negative post (-) of the
discharged battery. The resulting electrical spark
could cause the battery to explode and could result in
personal injury.
5. Start the engine in the vehicle that has the booster
battery, let the engine idle a few minutes, and then start
the engine in the vehicle with the discharged battery.
Once the engine is started, remove the jumper cables in
the reverse sequence:
6. Disconnect the negative (-) jumper cable from the
remote negative (-) post of the discharged vehicle.
7. Disconnect the negative end (-) of the jumper cable
from the negative (-) post of the booster battery.
570 WHAT TO DO IN EMERGENCIES