My truck has been having electrical issues lately and I just figured that my old Interstate battery was on it's last legs. She wouldn't start this morning so my neighbor hooked his rig up for a jump start, and nothing happened, dead. We then jiggled the battery and she came back to life.
Then I drove to O'Reillys for a new battery. As the store guy Kenneth was installing it he went Oh shit, do you see that? Hmmm, not something you really want to hear about your old truck, but I'm really glad he spotted it. The ground wire was broken and hanging by a single wire at the chassis. Electrical issues solved! He snipped the wire, put a new clamp on and then ran a ground from the clamp to the old ground spot.
This guy went above and beyond the call of duty for a battery sale and I have myself a new parts store.