Thanks to any one who takes the time to troubleshoot this with me!

I swapped a blown engine in my sons G37 with same year same drive train donor car. It didn’t start at first but I had not clipped the long white plug in all the way under the glove box. After I fixed that it started and ran great for a day. Next day it would not start. I was pretty punchy at the end of this swap and I left a wire that was installed by the owner of the donor engine loose. It is a wire in between the white starter plug wire. I left it undone because I wasn’t sure if it needed to be open or closed to start car. It started closed but was left loose in brake fluid comp. I found it touching ac line when it wouldn’t start.

I get the orange key light and brake push when in car. Push start everything goes dark then back to display. I seem to remember that the dash lit up in acc mode, now it does not. Radio will come on. Fob locks and unlocks car.

Here is a list of what I have tried.

New battery
fob battery
battery disconnect fuse link ok
new dash lock box thing
cussing
cleaned starter post
jumped 12v to s on starter, it cranked no prob
new starter relay next to battery
checked fuses next to battery box
cussing again

The steering wheel will lock and unlock and the button goes from acc to on to lock so I am at a loss here.

When his car ran I was super dad, now I may loose my man card if I cant get this running again.