[Brian]

I'm a bit confused now [not hard to confuse me!]- once the fields are set in an ignition coil, they don't easily become reversed. If I were to initially check the polarity of a brand new coil with the above pencil test, and found it was reversed, wouldn't that immediately have 'set' the fields within the coil, meaning that, even if I then reversed the wiring to correct the polarity issue, there would be the potential [no pun intended] , for the coil to not operate as it should?