Got a hyster that all lights are out including brake lights. Found what I believe is the fuse for the circuit blown. Replaced, but it blew instantly. Was thinking of disconnecting each light one by one, then plugging them the same until I find the culprit. Place had to close so didn't get a chance to. Right before I headed out an operator said that there's a black box by the lift side that goes bad and causes the lights to go out and that it has to be replaced to get them back on. Does anyone know of this? Or does anyone know how to resolve this? Thanks