Urq dash problems

[Mike Ernest]

My 83 Urq received new, higher output headlights. Off the shelf GEs went in
and since I've experienced problems similar to others owners...melted
ignition switch, etc. I'm doing the rewiring tricks and finding that helps.
However, I have a dash problem I can't figure out.

Started as a buzz inside the dash and it would continue until the dash
instruments would start to swing (power on/off). The dash shows warning
lights as soon as the ignition is on , OXS, the Battery icon and the brake.
I did find the fuse that controls the dash and when unplugged the dash is
dead and the buzz goes away. The buzz is intermittent and when I idling at a
light it starts. I can get it to stop with a quick blip on the gas pedal.

Ideas???

Mike