my 1994 F150 has just started to do a seris of short beeps when i turn the ignition on doews about 4-5 short beeps pauses and starts over again everything is fine on truck don't understand it's coming from under dashboard any help debbie

 

Does the airbag light illuminate when you turn the key to "ON"? That sounds like the warning beep to tell you that the airbag light bulb has burnt out.