I would like to change all my outside lights except the headlights and fogs to led. What I want to know is do they make leds with built in resistors or will I have to put them in? I have a 2003. Or is there a flasher module that works? Already did drl and back up lights with no problems. Reading up on this most have had to add resisters but I would like to not have to mess with the wiring.