anyone know where this should be?
1 black, 1 brown and 1 brown and white....
ok heres the fresh air box.
pipes 1, 2 and 3 are connected to the riser pipe coming from the heater channel.
no.1 feeds hot air to the lower corner of the windscreen.
no.2 feeds hot air to the centre vent, over your radio.
no.3 goes into the T-piece and connects to pipe no.4.
no.4 takes in fresh air from the fresh air box (no.5) when you open it using the 2 knobs on the dash.
No.4 is hidden behind the insulation in the picture
I think the idea is to draw in fresh air from outside, and mix it with the hot air coming from the heater channel. The motor isn't working on mine so i can't tell you if it works properly!!
hope this helps....