Testing Dyna S

[OldVet66]

The trigger modules need to be secure. After 1-4 is set with a timing light rotating the main plate, you can bring 2-3 in line by sliding the module on the screws. They are close enough from the factory to run nicely but I have never seen them spot on. A loose module is just going to give you erratic timing. Hope the next test tells you what you need to know.

[Tom R]

By switching both signal wires and spark plugs, what you really tested was your coils - which seem to have passed.
Sounds like something is still odd with the 1-4 trigger on the dyna - in order to test that, assuming you're starting fresh and normal wiring for the dyna and plug wires, - you could rotate the dyna plate 180 degrees and switch the plug wires. This way the 1-4 marks on the plate will be timed to fire the 2-3 cylinders - and vice versa.

[60ratrod]

the pulser coils need to be checked at the ignition coils, where the ring terminals screw into the coils. not the orange/white wires, but the other colors. i can't recall the colors off the top of my head right now

[OldVet66]

The other two wires are the white and black trigger wires one to each coil directly from each module. Since the PO used blue wires from the module connectors it's hard to say what it is on his bike, I can't see it from here.