After years of jeeps and related wrenching, I bought a '73 FLH - shorted and caught wiring harness on fire with a bit of accelerant from the oil... Replaced harness and voltage regulator - everything checks out but NO spark. Suspect ignition coil - replaced it (Accel dual fire - replacing what was there)...no joy. Next step is the ignition module.

Pics attached - it's a three wire setup (Black, Red, White)...my tape job showed red to top of ignition coil, white and black shared a connection and my notes had them on the bottom of the coil with the white wire from the kill switch... Wired it all up - no spark.

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Now I am dumfounded - it's not the points system, or a Mallory or a Dyna - so am not sure how to problem solve. Could be the ignition gizmo (though the led lights up and changes intensity when cranking and a trouble light lights up as one would expect if connected to the white wire and battery+). Could be my wiring was off (Dyna 2 wire replacement says if you get the wires wrong - instant destruction) or I fried the modul Could be I had part of the ignition system in the cone but no module (likely elsewhere with crispy wires I threw out like a dummy). Could be I have no clue....

Coil checks out on bench and amp test. Would like to be sure before just buying more ignition parts tho - any way to tell beyond what I've done? Any recommendations on a setup?

pococj - TwistedBiker - DrHess - you seemed to know your stuff....what stupid thing am I missing?

 

I can't help you, but I'll bet the guys in the Shovelhead group can sort things out.

https://www.hdforums.com/forum/shovelhead-62/

 

Thanks - better group indeed. I figured it out last night - kill switch needed to go to the positive side of the coil with the red wire from the ignition - caused a short the other way....