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Tuesday 13 March 2018 at 14:25
Quoted from Chalkey:Ensure you put the diode on in the right direction (couldn't tell in the photo) then verify / replace the two transistors. Which wire goes to which lug on a two lug coil doesn't matter it's which wire the banded side of the diode goes towards.
I just had to put a diode on a coil...
Source: http://pinside.com/pinball/forum/topic/frankenstein-auto-launch-coil-stays-activated-when-powering-on#post-4278287