Electronics Interuption Question

Hi. I own a 1999 Saturn SC2 w/ about 62K miles on it. Occasionally, we will be going down the road or stopped at a light (has happened in both instances) when suddenly the car's electronics seem to click off for a moment (lights, ignition, stereo) and then click back on. It has never hampered the actual driving because it clicks off and clicks right back on, but makes me nervous that it could break down on my wife while she is driving around. I can't think of anything that seems to set this off, it only happens every once and a while usually, or goes through phases where it happens several times in one driving session. I'm thinking it may be a bad wire, faulty connection somewhere, or something along those lines. Any ideas? Thanks!