did you check obvious stuff like fuses,grounds,etc...also when you swapped harnesses and you put the new one on did you connect it to the battery and everything in the engine bay before you plugged it to the ecu...if so possible the ecu fried? DOes it get fuel? Does it get spark?
This could be useful info the future owner could use...Either way g/l and get pics up
Bump
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-Julien