Forgive my ignorance, A/M ignition

[Pete_89T2]

Originally Posted by RETed

Circuit is not as simple as we thought...

Did a quick test of resistance on the terminals.
If the parallel circuit was as simple as above, measuring resistance across the towers should be nil - not the case.
In fact, the towers are isolated from the two coil inputs + and - (no surprise there), and there is no resistance between either tower to coil ground - kind of a surprise.
The coil outputs are isolated from every part of the coil body including from each other.

Twin, independent coil circuits wound within the coil body itself?


-Ted

Ok, now it's starting to make sense. By inference of Ted's measurements, the tower outputs can't be wired in parallel. I can't draw & post the circuit, so hopefully this description will make sense to everyone if you reference NoDOHC's diagram and use your imagination.

If you added a 2nd distinct coil winding to the secondary side of the transformer, and connect one leg from each of these secondary windings to a common ground through a diode (i.e., allows DC to flow in only one direction, connect "-" side of the diode to ground, "+" side to coil winding) and the remaining coil leads become your L1 & L2 tower terminals, Ted's measurements make perfect sense. In effect, we have two secondary coils driven by a common primary coil.