This is a common problem with this generation van. It is caused by a break in the circuit somewhere on the main board. For some reason, the main bus routes through this board, so if the break is in the right place, the body computer doesn't let the engine computer get power, and the van doesn't stay running. This manifests as dead gauges and start/die condition. Smacking the gauge binnacle sometimes temporarily solves it. The correct repair involved finding and repairing the broken circuit. It may be as simple as a broken solder joint.