I've converted several taillights...get a spare (junker) rear housing that has the flat metal webbed connections that house the bulbs. Take the junker housing and pry out the metal bulb holder that is recessed in the plastic housing. These metal bulb holders snap in place and against the metal webbing that runs to the wiring connector but there is no connection for the extra hole. I piggyback the new bulb holder onto the current taillight with a soldier wire to the metal flat and run both on parallel. I would not recommend putting in a high watt bulb into this hole as it will melt. That's why I use the taillight sized bulb which is smaller and 12W I think to keep from burning a hole in the plastic. I too have the dash switch you refer to but elected to just piggyback the taillights and have more taillight than stock. The reflectors are very fluted and don't really give you much more than a red glow. I do use 50W halogen bulbs in the reverse, brakelight and turnsignal holes as they are not constantly on and I've not melted anything. It's a neat trick to have the extra plastic lit up at night, 4 vanagons in my town have commented and I've shown them how to convert. Good luck. JB |
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