LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, AWD >> Repair and Diagnosis >> Maintenance >> Procedures >> Vehicle Quick Reference >> Jump Starting >> Standard Procedure >> Jump Starting >> Vehicle Jump Starting
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Vehicle Jump Starting

GC0201323Courtesy of CHRYSLER GROUP, LLC
1 - Remote Positive (+) Post
2 - Cover
3 - Remote Negative (-) Post

PREPARATIONS FOR JUMP START

  1. Apply the parking brake, shift the automatic transmission into PARK (P) and turn the ignition OFF.
  2. Turn off the heater, radio, and all electrical accessories.
  3. If using another vehicle to jump start the battery, park the vehicle within the jumper cables' reach, apply the parking brake and make sure the ignition is OFF.
    NOTE:

    Be sure that the disconnected cable ends do not touch each other, or either vehicle, until properly connected for jump starting.

JUMP STARTING PROCEDURE 

Connecting The Jumper Cables

  1. Open the cover and expose remote positive (+) post of the discharged vehicle.
  2. Connect the positive (+) end of the jumper cable to the remote positive (+) post of the discharged vehicle.
  3. Connect the opposite end of the positive (+) jumper cable to the positive (+) post of the booster battery.
  4. Connect the negative end (-) of the jumper cable to the negative (-) post of the booster battery.
  5. Connect the opposite end of the negative (-) jumper cable to the remote negative (-) post (exposed metallic/unpainted post of the discharge vehicle) located directly in front of the under hood fuse box.
    CAUTION:

    Do not crank starter motor on disabled vehicle for more than 15 seconds, starter will overheat and could fail.

  6. 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.
    NOTE:

    Allow battery in disabled vehicle to charge to at least 12.4 volts (75% charge) before attempting to start engine. If engine does not start within 15 seconds, stop cranking engine and allow starter to cool (15 min.), before cranking again.

  7. Once the engine is started, follow the disconnecting procedure below.

Disconnecting The Jumper Cables

  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 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.