SecondGen

I have taken the grounds off, cleaned them and put some bulb grease on them. Checked both fuses and have power flowing through both fuses. Now for what confuses me, if I pull the fuse to the drivers side nothing happens and both lights stay on (passenger side at full power and drivers still dim) but when I pulled the passenger headlight fuse I lost both headlights (the drivers one is the one I’m having problems with) but when I check with my test light I still have power to the drivers headlight plug but it won’t light the bulb.

My issue is a dim drivers light. If I pull the fuse for the passenger headlight I lose both. I’ve replaced both fuses and checked my connection on the bulb, even installed a new switch.. where might my issue be?