sounds like the installation went wrong but then again u had them for a while without problem. i have same headlights just for a 96accord. check if the black wire is still good since u not supposed to cut it or touch it n anyway if that happens the results is ur problem. those headlight have 2 cables righ. one red one black. the red u can do whatever, black has to b ground well.
are u getting water in the bulbs? like from the inside under hood? u have the headlight cover from the inside?
i been having mines for a over a yr since they cameout first and never had a bulb burn out or anything bad. using h3 n the side h1 for headlights. g'luck