Dome light issue

Hello all,

I have a 72 duster that the dome light just stopped working in. Went on a trip and came back to no light. Shows 0V in socket pins with door closed, 10-11.5V with door open. Replaced the bulb and no change.

Original Bulb doesn't look burned out. Ohms is like 1.5. The pins on the back of the old bulb have a pretty significant divot instead of the convex shape of the new bulb.

The bulb is extremely difficult to get in the socket. Like I'm scared i'm going to shatter it and shove my hand into the glass. Already ripped a chunk out of my headliner after I popped the dome housing off :(

If I do get the bulb to seat in, still no light. Helpppppp!