JiMerit,
I have just been looking through some of the supplier's catalogs. They all carry a resistor but that may not be the best solution. Chevs of the 40 s have a regulated supply that will run all the accessories.http://www.chevsofthe40s.com/search.lasso?search=reducer&dept=truck
I must look at some electronic catalogs to see if there is a convenient 3 terminal regulator that is more reasonable in price. A 3 terminal regulator guarantees the correct voltage.
