Doug, sorry for the confusion. I didn't anticipate that you would study the image so closely. There is a wire from the battery (-) terminal to the distributor housing. It was not installed at the time I took the picture. Here is a sketch of the circuitry as per our discussions:
PICT0038.JPG 47.07K
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The fuse, switch and spark plug wires are not included in my test rig.
Edited by newenglandmini, 22 December 2015 - 10:23 PM.