Starts, but does not rev, no lights?

It sounds like the throttle pedal sensor got wet, I would remove it and take a air dryer to it to help get the moisture out and if that doesn't work I would get a new unit, But first we can run the codes to see if any are stored which can help confirm the issue.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please go over this guide and get back to us.

I would need to say I think it is the BCM because it hangs down low on the passenger side, it may have got wet and shorted it out. a CAN scan will tell us for sure. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/how-to-replace-a-bcm-body-control-module

Check out the images (below). Please let us know what happens.