Tail light issue

I’m having issues w/ my drivers side tail light.
not sure when this issue started I just know it’s been awhile and I’m finally getting around to figuring out what is going on. I’ve read previous threads on tail light issues and found diagrams on the entire wiring for the tail lights.
My issue is when I turn my lights on, my drivers side turn signal is constant, as well as my reverse light being on but very dim and neither side reverse light work. It’s only when I have the lights on. Otherwise everything seems to work fine to my knowledge. I figured maybe there was corrosion then when I started to check it out, someone at some point had spliced in aftermarket lights. And screwed w/ every wire there is connecting the drivers side harness.
I thought maybe something is crossed but I’ve tried everything and still having the same issue. Any one have any ideas?
I’ve been pulled over a few times. No ticket yet so want to fix this issue before I get a ticket lol! thanks in advance (I’m not great w/ wiring but I can under stand diagrams to an extent. The more simple the better)

 

What type bulbs u running?

 

Probably the easiest way to restore the wiring would be to compare it to an unmolested one and put it back to normal.

 

Plan on spending some time underneath your rig with a creeper and a test light. Somewhere the current just ain’t making its way to where it needs to go. Start up front and try to find where it is working and then work your way back to the light. Might want to have a battery charger handy. Cut a piece of wood to keep the brake pedal pushed down to check those. Good luck, playing wiring gremlin detective takes a lot of patience. But, usually when you find the problem, it’ll be so obvious why the weren’t working.

 

If I remember right, the parking lights on it are negative trigger, so verify that and keep it in mind when testing.