Originally Posted by bfloyd: I also added two micro LED's in the console shift plate that tell me when the cooling fans are actually running.
An LED in the circuit, presumably prior to the fans, will not indicate "the cooling fans are actually running". It will indicate that there is power at that point. It will indicate they should be running.
The original fan fail module attempted to determine if the fans were inoperable by monitoring current to the fans. If one or both fans failed, then the Fan Fail light would illuminate. I did a post here: http://dmctalk.org/showthread.php?21...-amp-operation It is an interesting electro-mechanical device.
BTW ... a similar circuit was published by Popular Science or Mechanics (not DMC specific). 60's & Popular Science as I recall. It was a circuit/article to monitor tail lights.