I have a 2003 Silverado , with no key in the ignition the drl lights, hi beam and low beam headlights , park lights ,washer pump horn and interior lights are all powered up. if you remove connector C1from the under hood fuse block or C2 from the body control module everything goes dead I have every connector inside the truck disconnected and the problem is still there I'm sure I have a short but where to start or is it a matter of just opening up wiring harnesses.