It may be your air bag ECU which is located in the centre of the vehicle in a compartment in the floor under the passenger seat if you have 3 seats, or just in the middle if you do not have a third seat. The well it sits in gets condensation and water from wet shoes drain into it which ruins the ECU. In my expert some plonker had fitted a fire extinguisher in the middle of the van screwing it straight through the ECU. (Air Bags for sale ) can supply a recon unit for half the cost of a main dealer.
Jack Birchley, February 2008