So my grid heater is not engaging.

I have my edge insight and can see the IAT temps, and they don't go up fast like I've seen on some videos when it works.

Thanks for helping, guys.

Troubleshooting done:
The grid heater light comes on at pre-start with no codes.
I don't see a power drop when starting.
Remote starts with no issue.
New OEM relay.
Power is verified to relay.
The ground is good to little wire on the relay.
Another little wire, when unplugged, throws a P0542 code.
So it's got some info going to it, I assume.
Test light between positive relay post and post going to the grid with no power.