94 Chevy Silverado 4.3 V6 - No Power

Hello and Thank you for Helping,

I have a:
94 Chevy Silverado Pickup
4.3 V6
C/K Series, Regular Cab
2 WD, Auto Trans, AC Work Truck

When I try to start the truck I have no power. I also do not have power to the lights, radio, horn or any of the normal sources. The truck was running normal and one of the family thought they left a light on and ran down the battery. I installed a new battery, cleaned the terminals, and verified that the new battery is good. I even used a booster cable as a ground from the negative side of the battery to the engine block, but still no power to the lights, radio or starter.

Thank you for all of your help.

Start tracing your cables/wires. It could be that a ground or power wire is out of place or is broke.