More data to add from today
According to my Haynes manual, the readings I posted above are within tolerances. Most importantly as I understand things,5 there is a large difference between the cold and warm readings.
More data to share from today:
I checked the wire from the ECT (Engine Coolant Temperature Sensor) and the PCM (Powertrain Control Module) and I had a good, strong reading via my ohms meter. I also checked the wire from the ECT and the MAP connection and had a good, strong reading vial my ohms meter.
I also checked the current with the van running to the back of the the instrument cluster (red plug) on the dash and received a approx. 2.5 volt reading.
I am trying to address one problem at a time, with the temperature guage on dash being the most important at present. With voltage to red plug reading 2.5 votes, is it safe to say that problem of an inoperative temperature guage lies in instrument cluster?
One more piece of data to add to mix: the van is very hard to start but once started and warm and then turned off, it starts right up.