dimmer won't affect park lites, and the switch doesn't care if you use 6 or 12V on it, but the repro switches aren't the best quality nowadays so I'd suspect it, but using a meter to find out where the voltage disappears would be better than just throwing money at the problem, could just be a loose connection at the switch

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics