Try disconnecting the battery for ten minutes, then reconnect it. In 1992 models, there was a problem where the Body computer would lock up. Everything that ran off it went dead. That included power locks and windows, all gauges, chime, and all interior lights. The engine still started and ran fine.
By disconnecting the battery, the computer would reset and work again, typically for the next 5,000 miles or so. The repair involved replacing any relays in the dash board that had a part number ending in "1001" because they could cause a voltage spike, and replacing the computer with one that was less susceptible to voltage spikes.
That problem did not show up in '93 and newer vans, but your symptoms sound similar.
Tuesday, March 31st, 2009 AT 10:00 PM