I had a bank reset relay not fire and I finally tracked the problem to the coil wire.The 120V was getting to the contact PINS where the feeder wires and coil wires meet, the COIL wires that came from the coil itself looked perfect. I had to look very, very closely at the actual coil wires and realized they each had a small crack following them around the pins. They had slowly disconnected themselves over the course of decades. Looked perfect, but made no contact at all. 5 seconds with the soldering gun fixed it. May want to give it a try. I posted a picture of this in another forum and I will try to find it again.
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