The 5 sets of 5 beeps, with a one second interval between repetitions, is a VERY SPECIFIC signal sent by the OBDII RCM to indicate it has detected a restraint system concern but is unable to control the airbag warning light to let the driver know there's a problem.
As jinx 8402 already said, it's explained in his "Need Help" thread below.
I must repeat:
While any OBDII RCM detects a Restraint System malfunction and makes the decision to initiate the 5x5 beep sequence or flash the airbag light if it can, it also locks itself into a defaulted "failsafe" mode that disables ALL restraint devices to prevent any incorrect deployment. You will have NO airbags in case of an accident. There are a few low-priority error exceptions to this stratagy, but don't assume they're what you have!
Ford engineering logic is that it is safer to have no deployment and trust the seatbelts in a collision while an error situation exists, than run any risk whatsoever of having an airbag blow off in the face of a driver just tootling along on the highway, enjoying the scenery, and CAUSING an accident.
Get the OBDII Network scanned for codes.
Let us know what errors the RCM detected, and we'll go from there.