RF parking lamp out/dash turn signal indicator on

Hoping for advice on a recent electrical problem. Car is a 1971 Dart.

The parking lamp circuit was working, now it is not. The right front parking lamp is out and the right dash turn signal indicator glows when the headlamp switch is in park or on positions. The parking lamp bulb is fine.

I checked the forward light harness pigtail and have 12 volts at the parking lamp terminal. I also checked the inside of the bulb terminal and have 12 volts there, too. Could this be the ground for the bulb housing?

Any ideas appreciated.