Vintage air problem

[crustysack]

My system will not switch from lower vents to any other vents, the system has worked fine for 2 months and and I tried switching from feet to defrost and nothing- blower fan still works fine- any suggestions? its a 4 lever control panel #49110-shq installed in a 65 GTO with LS1

[chops101]

Does your system use a test white wire that can be grounded to reset the controls to reference 0 ohms?

[crustysack]

well after 3 minutes of poking around I discovered a loose connection into the control module- works fine now