After fixing a wiring issue with my double din head unit in my 93 Miata (improperly wired 12v pwr). My speedometer no longer works at all. I have seen one other post of this happening to another guy but I don't know how or if he fixed it. Does anyone know how this could have happened or how to fix it?

 

It’s cable driven on the NAs, no electrical input required. Is the gauge not working or lights on the dash not working?