Quote: Originally Posted by
aww sheet 
i was playing with the idea of making a set of led tails. what i want to know is, after looking at cars that came with led tails, how does it work? the same leds are used for both brake and tail lights, is the voltage cut to like 9vdc, and then 12vdc when the brake is applied?
That's probably the case. With out putting to much though into it, I think you could probably run two positive leads to each LED, with one lead hooking up to the parking light wire and one hooking up to the brake/signal light wire. Provided your brake/signal wire lead had a smaller resistor on it then the parking light lead, you could get the dual-brightness affect.
