My defective lamp indicator has been lit since I purchased the car 3 weeks ago. Driving at night it seems the high beam on the passenger's side did not work. I never bothered until today after replacing the bulbs to actually look at the front to see what lamps were working.

The actual issue is that both high and low beam are working on the passenger's side, however, it is much dimmer than the driver's side. I tried the old bulb from the driver's side the was good, but the results are the same. The defective lamp indicator is no longer lit with the new bulb, just very dim. What should I look at?

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Current:
1985 300D aka Miss Margaret
1991 300SE aka Alarice
1995 SL320 aka Samantha
1997 K1500 Silverado
Past:
1999 E300 ex-wife got it and let her son ruin it
1984 190 2.3 ex-wife got it and let her son destroy a great car
1985 300D (CA version) aka Maybelline lost to deer at high speed.
1981 300D aka Madeline (went to salvage at near 400k) rusty, yet best car I ever drove
Wishlist:
McFarlan TV6 (only a few privately owned)
ReVere with Rochester engine
1917 Premier (only one left)