I’m pretty sure it’s a ground issue

68 newport custom With parking lights on my left turn signal indicators on the dash and on the fender is dimmly lit, it goes away when the headlights are on.

Right side cornering light isn't lighting up bulb is good. Left side works. Used to work not to long ago.

I did upgrade my headlight wiring harness and upgraded my headlights with H4 and H1 bulbs and hella fixtures

Think it might be my headlight switch? I haven't gone behind the dash in a couple of years now.
Author: jct