Need Advice on wiring problem?

[summerj]

Everything was working smoothly for months on my 65 C10 and then just the other day I was driving down the road, I pulled my headlights on and immediately the motor died. I lost all power. to hei distributor. Headlights etc.


Six months ago I installed 2 aftermarket- eight fuse panels side by side. One panel remains hot at all times and the other becomes hot with the ignition switch. I have a 30 amp relay and fuse that feeds the accessory fuse panel.This system worked fine for six months.

Cant seem to figure out what the issue is?
I have the original wiring harness attached to headlights.
I tried disconnecting the hi beam switch
I replaced the OEM style headlight switch in the dash with a new one-
still nothing.