How to Diode to Prevent Feed Back?

lam13 wrote: That's not a white light, its a LED RED LIGHT, that I want to use as a running light in the rear FOG LIGHT HOUSINGS... LUIS

O didnt catch that part. Well i think as long as its dim, like ur tail lights would be then when u hit the brakes it lighted up brighter, then i dont think it would be illegal, but i dont think ur rear running lights can be brighter than ur break lights. U might check with the local Law just to be safe. Sure hate to get it all done and find out theres a nice fix it ticket waitin for you.~*Ben*~

What you have to do is add diodes to both the turn light wire and the brake light wire. Use a pack of them from radioshack. Make sure the white line is on the side leading to the light.

looked at your pics again, are you sure yo are using a 3157 2 circuit light? those things should be already configured for voltage polarity or you just got a cheap one.