OK this got me thinking, for a second I thought the oil light might be associated with the beeping. But the automatic seat belts don't work either. The driver's stays closed, so I can put the seat belt on fine, but the passenger's side stays I guess you can say open, to the front of the car, it doesn't slide back.
Whatever is causing this, could be causing the beeping, because the seatbelts aren't working right.

I'll check the oil pressure switch, maybe the wire is just unplugged or something like that. I can check the actual pressure with a gauge, If I have pressure, then it could be electrical.

I'll check the ICU, what other years and models can I use. I have access to EF's and EK's from friends.

Bulb Check? Just check if they all turn on when the key is turned?

Thanks for your help and Ideas.