99 Ford Ranger XLT 4X4 5 Speed V6

Yesterday while driving down the interstate
my truck completely shut off, no power
steering or anything. I pulled off to the side
of the road and tried starting it. Nothing, no
clicking like it was even trying to turn over.
While the key was in the accessory
position, everything on the dash like the
stereo and the scanner kept trying to turn
on. But they kept turning on and off. I
checked all the fuses in the truck and under
the hood. They were all fine. I had my dad
grab me a new battery on his way and it
wasn't the battery either. Although the
positive terminal was extremely hot. I also
heard a weird clicking noise under the
steering wheel. Any help on what needs
replaced or fixed would be greatly
appreciated! Thank you in advance!