Been there done that.

I came across the same problem. I had my dash removed by a mechanic to fix 1bulb. The car came back and the whole right side wasn't working...and to add insult to injury, the bulb that was installed burned out. More damage was done than good.

Anyway I put up with it for about a year. Then had it fixed. Basically the ground was screwed up. Fortunately it's a DIY job. Just solder a wire to the back of your cluster and screw the other end to the car's body. I'm sure your problems will be solved.

Lesson....if it's NOT mechanically important, don't fix it.

Good luck.

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JR
1986 Gold 300E 4Dr automatic