Thanks very much for that - I always wear a seat belt, but the alarm going off a few seconds after I pull away really annoys me, so I'll be checking for the connector under the seat and try unplugging it.I don't know where the alarm itself is (I assume it's the same alarm as for door open etc, so a good safety feature to have). If it's the 'sensor' in the seat that is broken (it thinks someone is in the passenger seat) you could always just unplug it under the seat. I didn't even know my passenger seat had a seat belt alarm until I saw the unconnected connector underneath - when I plugged it in it now works as it should - I expect the previous owner unplugged it because he used that seat to carry stuff on and didn't want it going off all the time.
Have you tried just unplugging one (the one for the 'load' sensor) - that was the only one I suggested unplugging, not the airbag plug too.Well that makes even less sense. The vans we have here use 2 occupancy sensors for the passenger seat that are bolted to the seat track. Unplug them and the airbag light on the cluster comes on which usually means your airbags are disabled. You guys must have completely different vans overseas?