Last year I bought a Mustang. It had no air conditioning. I wanted to fix that. Needless to say, I’ve never done it before. Total beginner here; I’m learning the same time you are, giving myself a crash course in automotive climate control repair. Some of it went according to plan.
Mustang shown is a 2000 V6, but the basic principles apply to most cars. Stay tuned to this channel for the follow-up on that aftermarket stereo head unit replacement.