ah ya i saw video of guy replacing sd70ace lights with prewire leds and i currenty thinking about ordering same kind. the wires look bigger on the ones he used. and it got resisters added in them witch i like. smd 0805 look like they have good size wire.
i finally figered out how to wire the bulbs with resisters. i was trying to hook them up like led. it didn't work. so i found page with diagram and follow that and it work. now for resisters since the soundtraxx noted to use 560ohm but to make it bright you pick lower resister number. so i went with 470ohm for ditchlights and 560 for headlight and backlight. thanks for the help.