Hi, I think my 1990 sonata is dead. When I started the engine this morning it went fine. I shifted to reverse (A/T) and after a few feet, the engine died. It will not start again. All I hear is a click click click while I'm trying to start it. We tried a series connection with another battery from another car but it did not work. My lights can still be turned on and my horn still works. What could be the problem?