My sister owns a 1998 Jeep Grand Cherokee and here are the following issues:
Radio works and then when you hit a bump, the radio goes out. Hit another bump, the radio comes back on. The issue applies to the dash (instrument) lights. The issue with the door locks is this; while driving down the road, the door locks will continuously actuate themselves. Iknow that on some vehicles, these components are controlled through the "Body Control Module", but I am not familiar if the Grand Cherokee has one.It may also be a bad ground issue. Any advice is greatly appreciated