Wanted new radio now dash ac info screen or radio don’t work rear ac works tho
This is right ^^^ Pay a pro to wire it correctly. Very difficult to access and support over the internet. I’ve rewired older vehicles but I would not attempt to fix what someone else botched. I bet a pro could wire the new unit correctly and make the dash functional again. Take that path-difficult to read your post with no punctuation but it seems like your buddy messed up..
that's a tough problem to ask over the internet , especially when someone has tampered with the wiring. there could be anything wrong. you will need to re trace his steps and see what mods me did.
if you are not electrically inclined, you may be better off going to a radio shop who has experience in asian vehicles.