The PO of my car installed an Allison XR-700 electronic ignition module in
my MGB. There is, among others, a red and black wire coming out of the
control box: the red goes to the (+) side of the coil, the black goes to the
(-) side.
When turning the engine by hand, there is no change in voltage or continuity
from the black wire. The ignition was on, and as the slits passed the
electric eye, I would have expected to see the a change in the black wire,
similar to points opening or closing.
Do I not understand the principle of the ignition circuit, or is something
else amiss?
Thomas
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