Steve, if they don't both light, what's the point of 2 filaments? Maybe I'm missing something. What makes the taillights brighter when you apply the brakes? If there is a problem, it is a problem that is duplicated on all my Imperials . . . Thanks, MM Stevan Miner wrote: > Hi Mark, > When you apply the brakes both filaments aren't supposed to light on those > 1157's. I'm guessing that you have a bad ground somewhere and that is what's > causing both to light. When you get that fixed you'll find that they are > both brighter, taillights and brakelights. Try a 1156 bulb to replace those > 1095's. > Steve Miner > Miner Auto Service > Winnebago, MN 56098