"Crank" and "turn over" are the same thing. Does it or doesn't it? It sounds like you have a low voltage issue due to a bad battery or loose or dirty cable connections. If you can get it to stay in the bad state long enough to do some testing, turn the head lights on so some current is trying to flow, then measure the battery voltage right on the posts, then on the cable clamps, then work your way down the cables until you find a point where the voltage is lower. That will be the location of the bad connection.
Wednesday, April 3rd, 2013 AT 12:07 AM