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410 Posts
Error codes caused me to dump using LED taillights too. Just wasen't worth spending those big bucks to get a set of really good bulbs. Maybe those bulbs are just defective from the start what with that odd pattern. Those bulbs seem kinda wonky to me. Sometimes I just chalk it up to the old adage ... ya get what you pay for. 😕
 

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You've gotta use a headlight bulb that has a decoder and/or resister that comes with it. Otherwise, your bulb isn't drawing enough current and they can't handle the pulsing DC current the truck is sending to it to check for bulb out conditions. The Fahrens I was using were like $60 for the pair. Can't use the cheaper models with a fan only.
 
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