Another question about my 91 Civic DX. After driving around for maybe 20 mins. or so, this has happened twice, I hear a beeping. I think its 3 beeps, pause, 3 beeps but does not seem to last for more then maybe 10 seconds or so. My seat belt light does work it seems and when I have not used my drivers side belt it will flash/beep but this beeping without engine light is making me nervous.

I had read somewhere about sim model accords doing the seat beep without provocation after driving a certain amount of time, hopefully it is just that same problem. Any advice or opinions welcome.