Ok, it can be done.
First off, there I would warn against any safety concerns, such as a passenger who might have their hand in the window, or if you were bringing something home from a store, and had to have part sticking out the window.
Totally automatic could be bad in those situations.
You could however re-wire the cut-off switch to cutoff all the windows, not just the passenger windows.
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How it could be done:
You would need a few relays to work the switches, and some "Limiting switches"
A limiting switch cut's off the button as soon as the window is all the way to the top, or bottom.
If you have a moonroof, you can see how the limiting switches work.
If you hold the button down, the moonroof closes, if you press the button to "close" again, nothing happens, as the switch is disabled.
But none of the power windows have limiting switches.
You can tell, if you turn you headlights on, and push the UP button on a closed window. The window tries to move up (It even may make a slight noise) and your headlights will dim, as the motor is active, even if the window is already up.
Yes, the driver side has an AUTO mode, but this works off a timer, rather the limit switch.
So, if you want an auto circuit, it would have to activate as soon as the car turns off.
This can be done with a relay.
But you would have to add limiting switches to each window you want to auto activate.
You would need a Limit switch for the UP position on the window.
A common type of switched used for limit switches is a spring loaded switch, or leaf switch. You can get these are nearly any auto store.
As soon as the car turns off, the relays would activate the UP buttons for the windows.
The windows would then role up, until the Limit switches are closed.
The limit switches would then have to cut the power to the relays, so that they don't push the window up and higher, or drain the car battery.
The best switch for the job would be a Normaly Closed switch.
This all sound complicated, but it is not as complicated as it sounds.
Here is a diagram of the switches and relay for one window:
Let me go through it:
RLY2 is what actualy activates the window being rolled up.
It is wired to the button you press to role up the window.
RLY2 can be disabled by any of three switches:
-RLY1 is wired so anytime the car is on, the window is free to move, and the circuit is inactive.
-SW1 is the limit switch, this stops the window once it reaches the top.
-SW2 is a recommended re-wireing of the "Disable switch" that already exists on the car, this will allow you to disable the auto circuit at any time.
Also remember the manual only recommends that you don't activate more then two windows at a time, or you could blow a fuse.
If I did this, I would only be concerned about the front windows.
I would probably also leave it disabled most of the time.
I would rather park with the auto circuit disabled, get out, and simply press the disable button, enabling the circuit and rolling up the window as I walk away.
The only problem with the circuit is that if you pressed the DOWN button, while the car was off, but the circuit was on, I am not totaly sure what would happen. It would probably blow a fuse.
This could be fixed by using two relays, one that disables the DOWN part of the switch, any time the Auto circuit is activly enabled, or running.
/Edit Heck I just went in and added it anyways,
Basicly you need to cut the output wire of the Down switch, the wire it to a relay, so that the Down switch isn't enabled if the Auto circuit is enabled.
The catch is that the Down switch would be useless as long as the Auto Circuit is enabled, this means to role the window down just press the Disable button, and then role the window down.
I guess that works out fine, as then when you get out, just press Disable again, the auto circuit kicks in, and the window goes up.
I also added Diodes that prevent the +12v Accessory, from mixing with +12Volt Battery.
Hmm, mabye I will try this soon, there isn't that many parts to it all.
This was a fun challange for me.
/Edit, I just thought of a good idea for a switch.
Glue a magnet to the window, then mount a Reed switch.
That way there is no mechanical hitting of a spring or metal by the window.
/Edit, Edit:
This could also be re-wired so rather then having an Auto-on, you could have a single press-button that you push anytime you want the windows to Auto-role-up.
(Diagram if someone wants it)