Tools Required For the Jeep Key Fob Battery Replacement Process. Before you embark on the battery replacement process, you should gather the required tools. Therefore, ensure you have a Flathead Screwdriver that is small in size. You will use it to retrieve the old battery. Additionally, purchase a new CR2032 battery that you will use as a Cherokee Latitude 3.2L V6. We purchased a used 2018 Jeep Cherokee Latitude (< 13,000 miles) from a dealership in Colorado Springs on 10/17. On the way home, about 100 miles, the Stop/Start warning Buy Replacement CR2450 2450 OEM OEM Battery for 2018-2022 Jeep Prox (Bundle with Opening/Pry Tool) for Wrangler Gladiator Grand Cherokee L Laredo, Series I, II, III - for M3NWXFOB, M3NWXFOB1, OHT1130261: Keyless Entry Systems - Amazon.com FREE DELIVERY possible on eligible purchases I’ve had my 2018 grand Cherokee trailhawk since January, end of my car was dead so I got the main battery replaced. Two weeks later car was dead again and has been a reoccurring issue, I went ahead and also changes the alternator and aux battery but it has still kept dying. Finally took it to the dealer and they said both batteries were dead If your battery does not have this function, you should keep on reading to see in what other way you can check its status. B. How to use a multimeter to check the status of your Grand Cherokee‘s battery. Get the car ready: To check the voltage of the battery, the engine of your Grand Cherokeemust always be turned off. If the engine is on, you Stop/Start Screen. In the following situations, the engine. will not stop: • Driver’s seat belt is not buckled. • Driver’s door is not closed. • Battery temperature is too warm or cold. • Battery charge is low. • The vehicle is on a steep grade. • Cabin heating or cooling is in process and an acceptable. Video on how to tell/test if your alternator is goin bad or underperforming and not charging your battery by using a simple volt meter on your jeep. You can 2018 Grand Cherokee with stop/start battery. I replaced the main battery and a blown fuse block Mopar 68089468AA .The battery texts great under the passenger seat but in the engine bay the post/neg posts I'm reading only 4 to5 volts. The interior lights barely flicker. Help. Mechanic's Assistant: Sure thing. Just to clarify, which lights are we PF2rZ.