EEVEE

So i cant figure out for the life of me why my cargo light is flickering it done it with the original bulb and now worse for the led one i put in, I am looking at the contacts, wiring and everything and i just cant see a cause for it to flicker. I installed a subwoofer recently and it flickers like strobe light when its thumping its honestly getting worse because i have to smack the light to make it light up sometimes. I even cleaned the contacts and all