LED Brake Light Intermittently not working

[Gools]

06. LED brake lights. Turn signal works with no issue. Brake light occasionally does not. I’ve pulled interior trunk/cargo light cover, shake some wires and seams to come back life. Anyone have similar experience? Issue is only on passenger side.

[Estoril]

You either have a short, or a stray worn grounding wire. Work one wire at a time.