relzein

Hey guys, Im new to this forum sorry if its the wrong thread... I have a 95 Honda Civic DX and about a month ago, while driving my radio, and Radar would restart along with my Speedo needle would drop all as if my car shut off and came back on.. It stopped the same day and started back today when i was driving my lights dimmed and everything seemed to have powercycled itself ... its as if my card died and came back within seconds .. what do you guys think would cause this? My battery was the first thing i checked and its fine.