I have a 2000 Ford Windstar Van with 155,000 miles on it. A problem has developed with the electrical system/components. The van will start and run fine. With the engine running, there is no instrumentation, power windows do not work, wind shield wipers do not work, radio does not work, heater blower motor does not work. After the engine has been shut off, the radio will work, windows will work, door locks until such time as you open the door, then all quits. With the key in accessory, the windows work, door locks work, radio works, etc. The neutral module was replaced (the old one, none of the contacts appeared to be burnt). Ford dealer spent an hour trouble shooting - checked body modules (2) - found nothing. Any suggestions???