[cookiemech]

I don't have the diagram in electronic form, though I could scan it in at some point (my computer's not in my garage). It appears to me that the seat belt has a diode in it (did you try measuring continuity in both directions?) I am basing that on the wiring diagram and standard diode symbology. What's tricky is that they incorporated both the seat belt bucked/unbuckled wiring and the occupant detector sensor wiring in the same connector, so that if it is possible to defeat the seat belt warning by disconnecting the wire, then it will be necessary to remove (or cut) the individual wires to that connector.