The beeping is your airbag module located behind your radio. It's a blue box. Something is up with your system. If you just want the noise to go away, I heard there is a connector under the driver's seat, but I would reccomend unplugging the connector to the module. Your airbag light may come on. The real fix would be to have it serviced.
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Blueneonman - '95 5.0L Mustang GT Convertible | K&N Custom Cold Air Intake | FMS 9mm Wires | Hollow Cats | Flowmaster 2 Chambers | BBK Subframes | 6-pt Rollcage | King Cobra Clutch | FMS Adjustable Clutch Cable | Coolest Neon Lighting on a Mustang EVER!
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