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I have traced the circus back to and into the DME and they both go to the same area in the DME board. I now Need to have an electrical engineer look at that circuit and see if they can make sense of it.
I also am looking for technical information on the sensors them self. What is the input and what is the output over the RPM range would be very helpful. I got the test procedure from the shop manual. It is helpful but does not tel us what the output is when the car is actually running. It only look at what it does when it is cranking. I am wondering if I can back probe the connections with the car running. I am not on the hunt for a simple oscilloscope. I wonder f my digital meter can sense the voltage with it running? Anyway it is a start.
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