Is it pretty easy to convert from nav to no nav in a 2000 Tl? I'm assuming just take out the nav and hook up the climate controls accordingly? The reason I want to do this is to install an aftermarket double din touchscreen radio with nav. so I don't want two touchscreens in my dash

 

No since there is a whole lot of wiring to do since you're getting rid of the navi

 

Are the factory climate controls, also controlled electronically? How messy am I looking at getting wiring wise just a couple different harnesses? From what I've seen in other cars most should have all the neccasary wiring and such avaliable due to the mass production of the vehicles