Thanks.

That was interesting reading; the Hall Effect .pdf from Honeywell. That is a good analogy, it is quite like a "magnet controlled transistor".

So, if I am understanding correctly, in these ignition systems two of the wires are "hot" and the third wire is grounded when the Hall Effect sensor is actuated, completing a circuit for the control box. (I imagine the circuit charging the CDI capacitor.) Is that correct? (Don't have a loose ignition system here to "play with" right now, but I would like to understand the circuit.)

Any chance of a simple schematic of just the Hall Sensor and it's three wires with their relation to the CDI box?

AV8TOR