My car has the auto ac function and is not working correctly. I read there is an *a/c pump* with 3 different color hoses. I fixed the the white hose and the blue hose. I cant seem to figure out what the red hose goes to. I see it runs into the firewall but after that what does it plug into? Do i have to take the dash out or can i do the replacement with the dash still secured? Any advice is greatly appreciated! Thanks!

 

Are you referencing your factory service manual for this work? XenonZcar.com Z31 1984-1989 300zx Reference