I have a 1994 4.9 liter Cadillac Eldorado with 163,000 miles on it. I have noticed recently that sometimes the car will not start. When I turn on the key everything inside the car comes on but nothing happens at the engine, no cranking no sound nothing. I played with the battery cables and it started so I thought I had a bad connection. I undid the cables and cleaned the terminals and then rehooked the cables up and now I cant get it to start at all. Any ideas?