You need to test the transistors associated with those coils. Manual will tell you which transistor goes with each coil.
https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Transistor_.22Quick_Check.22
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Quoted from SimplePin:I'm guessing I should replace this transistor as my next move?
You guessed right. You also want to double check the new coils (resistance) and any diodes on the coils. Don't think those coils call for diodes, but if they do, test them. Shorted transistors sometimes destroy diodes.
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