That's the Crane XR-700 now. I had one of the Allisons. I don't
remember if the amp broke the current flow through the coil or if it
pulsed the coil like a CD ignition does. Take a look on the Crane Cams
web site for info. A Google search will find it.
Cheers,
CR
Thomas J Pokrefke wrote:
> 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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