I have a 2000 jeep cherokee. Tonight I went to my friends house and when I went to leave, I got in my car, turned the key, and it cranked only once. I thought my hand might have slipped and let the key snap back too quickly, but when i attempted to turn it again my car would not crank at all. I just hear a faint buzzing noise while I turn the key in the ignition. Also, the lights, radio, headlights, etc all work fine.They do not dim when i turn the key or anything so i dont think it could be the battery. Nothing was left on inside nor was it sitting long enough for the battery to die. This has never happened before so I have no idea what the problem might be. From what I have read online about others peoples cars, it could bu numerous things.