Omaha, NE
Sounds a broken wire or bad connection. No easy method - just start following the power thru the wiring (follow the wire) and find the point where the voltage drops.
(Topic ID: 245743)
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Even if you had a shorted diode or coil - this wouldn't affect the coil voltage in this way unless the driving transistor is partially biased or bad. Are any of the driving transistors hot while idle? Be careful - hurts when you get the Fairchild Semiconductor logo burned into your finger tip.
Tough to test MOSFETs with a DMM as they don't test the same as an old bipolar transistor.
To me - this still sounds like a bad connection in the daisy chained power, possibly a bad solder joint.
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