Test the new key fob battery by standing near your Grand Cherokee while pressing the “Lock” and “Unlock” buttons.Slide the metal ignition key back into the slot on the bottom of the fob until it clicks securely into place.Ensure that the two halves of the fob are flush together all the way around at every edge.Line up the two halves of the fob and gently snap them back together.Insert the new CR2032 3-volt battery with the positive “+” side facing down into the rear cover of the key fob.The rear cover of the key fob is marked with the words “CR2032 + Side down”.Remove the old battery out of the rear cover using your fingernail, or you can use the small flathead screwdriver.This will reveal the green plastic remote control circuit board and the battery holder inside the rear cover. Pull apart the two halves of the key fob.Insert the blade of the small flathead screwdriver into the slot where the metal ignition key used to be and gently pry apart the two halves of the fob.Pull the metal ignition key from the fob and place it in a safe place.Slide the black plastic switch on the front of the key fob near the bottom to release the metal ignition key.Once you have the screwdriver and the coin cell, you should follow these steps to replace the battery: You will also need a replacement coin cell, also known as the watch or button. If you want to replace the key fob battery for a 2015 to 2020 Jeep Grand Cherokee, you will need a small flathead screwdriver to pry apart the two halves of the key fob. Jeep Grand Cherokee Key Fob Battery Replacement If you notice that your key fob does not lock your car, unlock it, or start the engine (for automatic-start buttons) as early as it usually does, then it might be time to replace your key fob’s battery. However, when the battery wears out, the signal strength and range of the fob transmitter are likely to reduce. Many Jeep owners utilize this function when approaching or walking away from their vehicle and want to lock or unlock it. Your key fob can send a signal to your Jeep up to 50 feet in most cases. Here are signs that indicate it is time to change your key fob’s battery: Reduced Signal Strength It is best to understand when to change your key fob’s battery if you want to avoid problems. If a key fob’s battery dies entirely, the fob chip loses power and becomes useless unless reprogrammed by the manufacturer. One of the leading causes of key fob replacement is not replacing a worn-out battery in good time. Most key fobs in the market today are complicated and might be pretty costly to replace. Like other batteries, a key fob’s battery wears out after being in use for a considerable amount of time.
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