2000 Buick Regal having headlight turn signal & reverse light issues?

I have a 2000 Buick Regal LS & recently I noticed that my passenger side headlight was dim, figured it was a bad bulb but changed the bulb & its still dim. I also noticed the drivers front turn signal wouldnt flash but does light up when the headlights are on. Then I noticed my reverse lights arent working? Does... show more I have a 2000 Buick Regal LS & recently I noticed that my passenger side headlight was dim, figured it was a bad bulb but changed the bulb & its still dim. I also noticed the drivers front turn signal wouldnt flash but does light up when the headlights are on. Then I noticed my reverse lights arent working? Does anyone know what could cause this issue or where to start looking? I'm wanting to fix this myself
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