Sounds typical of loose or dirty battery cables. Don't try to wiggle or fix anything yet. You don't want to temporarily fix the problem before you know what it is. If you have a test light or voltmeter, turn the head lights on when it won't start to insure there is current trying to flow. Measure the voltage right on the battery posts, then on the battery cables. If the voltage drops significantly when you move the probe to one of the cables, that's the one that must be cleaned and tightened.
If you still have good voltage on the cables, move one probe from the negative cable to a clean paint-free place on the body or a clean bolt and measure there. If there's a red cable that bolts to the under-hood fuse box, measure there too by moving the meter or test light lead from the positive cable to the fuse box. Check that nut too to see if it's loose.
Wednesday, February 9th, 2011 AT 11:03 PM