I replaced my air compressor for my air conditioner and now my car won't start?

I agree that I don't see how the compressor would cause this so that means we need to just start at the basics and see what we don't have and go from there.

To start, we need to find out if the theft light is on.

If it is, then we need to disable the system.

https://www.2carpros.com/articles/how-to-reset-a-security-system

If it is not a theft system, we need to find out if the engine is cranking and not starting or not even cranking when you try to start it.

https://youtu.be/dCjmRL3p4Cs

https://www.2carpros.com/articles/starter-not-working-repair

https://www.2carpros.com/articles/car-cranks-but-wont-start

Once we know this info, we will have a better idea on where to go next.

Please run through this info and let us know what you find, and we can go from there. Thanks