no lights

My existing florescent light has become dull so I removed it and bought a replacement LED tube. Installed it and it will not light up, thought maybe it was defective so I took it back and got another one. Installed and the same thing it will not light up, so I reinstalled my old florescent...

I took my corner armor off to paint and now running into issues with my wiring. It was cut and re wired to fit through the hole in the armor. I have these three from the harness. However there’s this 4th yellow wire. It comes from the same wires as everything else. From the top. I currently...