Hey guys, i don't want to sound dumb but I have a simple question on the heater in my 93 YJ. In the lower corner of the dash on the passenger side there ius a box that is part of the heater assembly that has a vent on the front of it. The vent is about 6" square and has a cable attached to it like it should open and close. But I cannot get the vent to open by moving any of the heater control cables. What the heck is this vent for and how do you open or close it? I can follow the cable towards the heater control but cannot figure out what it is connected to.
Any help would sure be appreciated.