I connected a 12V power supply (same one used for my railroad bell ;^) and nothing happened. Tried it on the bottom inner posts. No lights. The bulbs “appear” to be intact - all filaments complete. Seems unlikely that all 4 bulbs are toast. But maybe. With direct power (no flasher) they should all light correct?
As usual, the best advice is to start at the beginning.
Take out the lights, test them with an ohmmeter.
Validate that the operating voltage is 12 volts… often marked on the bulb base.
Test the lights with a 12v supply that has AT LEAST 1 amp.
Report back.
Greg
Thanks for all the help. I finally got it to lightup using a variable supply off amazon. https://www.amazon.com/NES-350-12-Switching-Power-Supply-110-240/dp/B007K2H0GI
I probably should just pull out all the bulbs and sockets and wire for standard 100 wall outlet huh? Hindsight is 20/20. I also just recieved this Union signal switcher relay and have NO idea what to do with that.