Just being 40's to 50's probably means it was designed for six volt use. Generally anything that is not voltage sensitive that was designed for six volts will work fine with 12. Six volt bulbs can't stand 12 volts, but something like a switch (which is what the controller is) will usuallt be fine with 12 volts.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...