What are the reasons for the ineffectiveness of the Grand Cherokee key after replacing the battery?

[LeAnnie]

The reasons for the ineffectiveness of the Grand Cherokee key after replacing the battery are as follows: 1. Whether the positive and negative poles are installed in reverse. 2. Check if the digital code on the battery matches the original battery code; the replacement battery must have the same code as the original one. 3. Poor contact at the positive and negative pole spring contacts. More information about the Grand Cherokee is as follows: 1. The Grand Cherokee's powertrain uses a 4.0-liter 190-horsepower straight-six engine, and a 5.2-liter V8 engine with 220 horsepower was later added. This was the first SUV model equipped with a V8 engine. 2. The Grand Cherokee features reinforced side and roof beams, with the limited edition adding four-wheel disc brakes, rear seat headrests, an electric sunroof, and an upgraded audio system, while eliminating the wood-grain body decoration of the Grand Wagoneer.