Ok got an odd one here. Bought a set of these LED replacement bulbs for the duel-filament brake/signal bulbs. I installed them and although the lights work, after 3 normal blinks the blink speed jumps into super speed! i still have one of the old bulbs … LED's are unidirectional and are onlybright in direct vision. Move 15 or 20degrees to one side ad they practically disappear. Sure they look whiter, but they are much duller going dwn the road as other cars see you! … …

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Weird problem with replacement LED tail light bulb – DodgeForum.com