User Manual - Page 301

For 2020 Wrangler.

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IN CASE OF EMERGENCY 299
4. Connect the opposite end of the negative (-)
jumper cable to a good engine ground
(exposed metal part of the discharged
vehicle’s engine) away from the battery and
the fuel injection system.
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.
6. Once the engine is started, remove the
jumper cables in the reverse sequence.
Disconnecting The Jumper Cables
1. Disconnect the negative
(-)
end of the
jumper cable from the engine ground of
the vehicle with the discharged battery.
2. Disconnect the opposite end of the negative
(-) 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.
If frequent jump starting is required to start your
vehicle you should have the battery and
charging system tested at an authorized dealer.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can
reduce the potential for overheating by taking
the appropriate action.
On the highways — slow down.
In city traffic — while stopped, shift transmis-
sion into NEUTRAL, but do not increase
engine idle speed.
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.
CAUTION!
Do not run the booster vehicle engine above
2,000 rpm since it provides no charging
benefit, wastes fuel, and can damage booster
vehicle engine.
CAUTION!
Accessories plugged into the vehicle power
outlets draw power from the vehicle’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 discharge sufficiently to degrade
battery life and/or prevent the engine from
starting.
6
20_JL_OM_EN_USC_t.book Page 299
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