Mpolli - man, that was a great help. I found the + wire and the battery is now charging.

Funny, when I first tested it with jump wires clipped to the leads with alligator clips (each wire had another alligator clip at the other end), I placed the probes on the alligator clip at the far end. Nothing happened. When I placed the probes on the real wires coming out of the charger, bingo I got 27.4 volts. So for some reason the power will not go through my jump wires and alligator clips.

Now the charger shows a red light and it is charging. So let's see how it does. The original directions told me that it takes 24 hours to recharge the battery so this must be a really out of date tool set even though I purchased it new at Pep Boys. Good old Pep Boys.