There isn't a relay. Power comes from the circuit breaker you replaced to the main switch on the driver's door and is distributed from there.
I attached the wiring schematic for you to review. See pic 1.
Also, if you look at pic 2, I highlighted the wire which provides power at the main switch (driver's door). The first thing I would check is if that has 12v power to it.
Do that and let me know what you find.
Images (Click to enlarge)
Friday, October 9th, 2020 AT 7:49 PM