Here's the issue...after i start my 03 GT and have seat belt on there is a beeping noise within a minute after. It is 5 short beeps, 1 second or less in length and 1 second apart. It is 5 sets of 5 beeps then nothing for about 5 minutes. Then it does it again and continues every 5 minutes or so. It is not the seat belt warning; that makes a different beep and the seat belt light flashes. This sounds like the same beeping noise as when you have the keys in the ignition and the door open but the beeps are a little slower and in the pattern described above. Just wondering if anyone else has had this problem and what it might be. I think I located the source of the noise. The fuse box under the dash on the drivers side has a black box attached to the back closest to the firewall with wires/wiring harness coming from the top...this appears to be where the noise is coming from.