Thanks for the info. I have verified 12 v going to pin 1 at the connector and have checked it in the PCM. There is a 100 ohm 1watt resistor on the pcm board and the 12v from the battery is dropped across that resistor. 12vdc is seen at the resistor. Now one thing I have not checked is the PCM ground connection. If the PCM ground at pin 40 is intermittently dropping out, would the pcm not recover once ground is restored and put the vehicle in safe mode. BTW, I have the electrical wiring diagram for the 94 e150 and it has been helpful. Do any of you folks have the book with the info on the pcm itself. I would really like to know if intermittent individual sensor input loss will cause the PCM to drop the vehicle into safe mode and if so, what sensors are they.
Again, thanks a bunch for your help. I have felt absolutely ditched (and helpless )by FOMOCO. Bill G.