I have a 1974 C10 2WD short bed stepside. Ground up, frame off restoration one nut and bolt at a time, just me and my son. Three years later I am ust a few weekends from being finished but have a HUGE electrical issue. I replaced the stock glass tube fuse harness with a GM EZ Wiring harness. I have connected every wire and ground exactly as it should be...at least that's what I thought. Here's the issue, I have power to the guages, and headlights, but no power to anything else. No dash lights, running lights, turn signals, brake lights, hazard emergency flashers...NADA. The truck runs and drives and fires over on the first try. I am at a loss as to where to begin chasing down the gap in the system. Any advice or educated steps as to where to begin would be greatly appreciated.