New coil's diode faces the other way: keep each wire on the same diode end
A replacement coil may come with its diode the opposite way round from the original. What matters is not which lug is which on the coil but that the supply wire still goes to the banded (cathode) end of the diode and the drive wire to the other end. If the new coil's diode is reversed, swap which lug each wire goes to. Wired backwards, the diode shorts the coil the first time it fires, which can blow the fuse, the diode and the drive transistor.
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Source: Pinball Repair help group!! (Facebook group)