Welcome back. It is never a bad idea to check main fuses. As far as a relay, I feel you hit the important one. Do you have a live data scanner? If so, connect it to the DLC and go to RPM information on the tool. Then, crank the engine. If there is no RPM reading, I suspect the crank signal is missing. Also, check fuse 5P in the under hood fuse box. It is for the ignition coil relay. You may have blown it. Also check fuse 2P which is for the camshaft position sensors.
I attached a schematic of the wiring from the under hood fuse box. Take a look through it.
Let me know what you find.
Joe
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Tuesday, October 9th, 2018 AT 5:23 PM