Truck is a 05 Ford Sportstrac. It has went dead when idling or when slowing to come to a stop. Once dead....you turn off the engine and it usually starts back up. You never know when it is going to happen again. Recently, the positive battery cable was lose and had to be tightened. I was hoping that was the problem, but now I have discovered this is not the problem. Thoughts? Could it be something causing a short?