I'm also confused on how it was running fine and now using the same key it won't even try to start?
That's pretty much how all electrical/electronic things work, one day it works and the next day it doesn't, so don't be confused
A light bulb works until it doesn't, no warning
A mechanical system "might" start to make a noise ahead of time, so a bit of warning, but not always, sometimes they just "blowup", lol
You need to get the installation manuals for BOTH units if you want to remove them, because they WILL have to have been hooked to the Ranger wiring harness to work, to intercept signals and by-pass or re-route them
You will need to repair/reconnect any of those interfaces