Ignition Help!

That power goes through the bulkhead connection and through the ALT' gauge / amp gauge. There should be a wleded splice of branches in the wire , one to the ign' switch, one or 2 to the fuse box, and one to the headlight switch. So if none of those branches are hot, ( no horn, no lights, no ignition switched power ) we know the fault is at or before that branch.