Well, wasn't the battery cable. Today with the ignition off, no key in, I checked all the fuses for voltage. I found 11.5v when I tested the stop light fuse. I can't imagine that circuti should have any voltage going through it except when the pedal is actuall applied. I pulled the fuse and am running the truck now th get the battery charged again, then I'll see if battery drains still with the fuse pulled.
