Jeep grand cherokee 2017 User Manual page 220

NOTE:
Make sure at all times that unused ends of
jumper cables are not contacting each other
or either vehicle while making connections.
If frequent jump starting is required to start
your vehicle you should have the battery and
charging system tested at your authorized
dealer.
CAUTION!
Accessories plugged into the vehicle
power outlets draw power from the vehi-
cle's battery, even when not in use (i.e.,
cellular devices, etc.). Eventually, if
plugged in long enough without engine
operation, the vehicle's battery will dis-
charge sufficiently to degrade battery life
and/or prevent the engine from starting.
Cable Connection
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.
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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 jumper 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. Only use the specific
ground point, do not use any other exposed
metal parts.
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.
CAUTION!
Do not run the booster vehicle engine
above 2000 rpm since it provides no
CAUTION!
charging benefit, wastes fuel and can
damage booster vehicle engine.
6. Once the engine is started, remove the
jumper cables in the reverse sequence:
Cable Disconnection
1. Disconnect the negative (-) end of the
jumper cable from the remote negative (-)
post of the discharged vehicle.
2. Disconnect the opposite end of the nega-
tive (-) jumper cable from the negative (-)
post of the booster battery.
3. Disconnect the positive (+) end of the
jumper cable from the positive (+) post of
the booster battery.
4. Disconnect the opposite end of the positive
(+) jumper cable from the remote positive
(+) post of the discharged vehicle.
5. Reinstall the protective cover over the
remote positive (+) post of the discharged
vehicle.