ok lets get started.I wanted to fit auto close windows when the alarm was armed to overcome the numerious times either my passenger or myself had left windows open when the ignition key was removed........so switch ignition back on and close windows remove key again.....what a pain. Now I never heard of autodrop windows a couple of weeks ago but reading stuff on this forum and an input from Ian Lusso explained it to me. So my understanding is right or wrong autodrop opens window slightly on exit to prevent damage to window seal and likewise shuts windows when door is shut.
that got me thinking why not combine the two i.e. have autodrop and autoclose as originally planned. Now I point out here that my design is not in the least based on the Alfa factory design and as such some of you pure Alfa fans may tut at my efforts. In the event the outcome is the same i.e. windows drop 10mm on opening door and close fully on door closure.
My plan was to use one closure unit for closing and reverse wire for opening. I decided to use two closure units in the end mainly to minimise wiring and to simplfy things.
I decided to trigger these units from the ceiling light although not directly I used the control circuit for the light for the purpose. One unit has a negitive trigger and the other a positive trigger so there is no way both units can run together and damage things. So it works like this open door negitive trigger fires closure unit No. 1(reverse wired to window motor) and this is timed via a 12volt timer to drop windows approx 10mm. Close door and positive trigger activates closure unit No. 2 to close windows. The windows also drop when the alarm is deactivated which is not strictly necessary but it looks good in the car park and again once you get in and close doors windows shut. All the wiring and and control units are hidden behind the glove box at the rear of the passenger air bag housing, so nothing is seen which would suggest anything out of the norm. The hardest part was getting the wiring to the door motors as Alfa use a multipin connector to marry door the car therby preventing adding additional wiring through the rubber connecting conduit. I think it would be possible to gain access to the electric window control unit and find the necessary wiring to motors there but in the event I did not know the location of this at the time of installation and as such I done it the hard way. The unit is at present only wired to a peg board so needs to be hard wired at which point I will draw a wiring diagram The project was reasonably cheap to undertake the most expensive items being the closure units and the timer. I will keep you posted a I progress.