Sounds like a bridge rectifier may be toasted if your feature lights are out now - check those - that one on the right looks like it has gotten pretty hot -

At this point, for $55 shipped, there's no shame in getting a brand new replacement. If you are decent at soldering, you can get the kit unassembled for $35 shipped.
That board looks like it's been stressed, stitched, jumpered, and hobbled along for years now - let it die a peaceful death.....just my 2 cents worth....

https://nvram.weebly.com/new-pcbs.html

Try a different bulb - - - -

You can search the forum here on how to test the rectifiers - I'm actually punching out of work right now and hitting the road -