yeah forgot printed circuit boards use a "plugg in" limiter and of course need ground on board. However I don't think is CLUSTER ground like IF is a ground problem is JUST the VOLTAGE LIMITER GROUND TERMINAL! not really cluster. Cluster ground problem should dimm gauge lightning too when fail is present.
that's at least what logic comes to mind.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
