2009 Jeep Grand Cherokee Owner Manual SRT8 - Page 344

342 WHAT TO DO IN EMERGENCIES WARNING! (Continued) • A battery generates hydrogen gas which is flammable and explosive. Keep flame or spark away from the vent holes. • Do not use a booster battery or any other booster source that has a greater than 12-Volt system, i.e. Do not use a 24-Volt power source. 1. Remove all metal jewelry such as watch bands or bracelets, which might make an unintended electrical contact. 2. Park the booster vehicle within cable reach but without letting the vehicles touch. Set the parking brake on both vehicles, place the transmission in PARK, and turn the ignition OFF. 3. Turn off the heater, radio, and all unnecessary electrical loads. 4. Connect one end of a jumper cable to the positive terminal of the booster battery. Connect the other end of the same cable to the positive terminal of the discharged battery. WARNING! Do not permit vehicles to touch each other as this could establish a ground connection, and personal injury could result. 5. Connect the other cable, first to the negative terminal of the booster battery and then to the engine of the vehicle with the discharged battery. Make sure you have a good contact on the engine. 6. Start the engine in the vehicle that has the booster battery, let the engine idle a few minutes, then start the engine in the vehicle with the discharged battery.