how to automatically roll down windows

This was a fun project to work on that turned out pretty cool. I wanted to be able to roll down all of the windows on my 1998 Toyota 4runner by pressing a button on my keyless entry remote. My 4runner has a moonroof, a rear window that rolls down, and the normal 4 passenger windows, so there were 6 windows all together. Here is the schematic for the circuit that does the job: Schematic My keyless entry system is made by Autopage. It has several auxiliary channels that create a ground signal capable of drawing 200 mA when a button on your keyless entry remote is pressed. The signal can be grounded for as long as you want by programming the keyless entry system so I didn't need any timing circuitry for this project.    Here is a breakdown of the circuit: I needed 8 relays total. - 1 for the moonroof. - 1 for the rear window. - 4 for the passenger windows. - 1 to create a high-current activation signal from the original 200 mA signal. - 1 to trick the car into thinking that the keys were in the ignition. As you can see from the circuit the 4 passenger windows work differently than the rear window and moonroof. For the rear window and moonroof you can simply ground the correct wire and voila! your window rolls down. If you try that with any of the passenger windows of a 4runner things start to melt... I chose not to make the circuit capable of rolling the windows back up because my 4runner doesn't have any sensors that would stop the window motors if anything got in the way of one of the windows. It wouldn't be good if I crushed my dog's tail by pressing the wrong button. I'll post a video of the windows in action soon. I hope this helps someone because the12volt.com and toyota-4runner.org/ were extremely helpful during the research portion of this project. Oh and the best part (besides my car not blowing up) was that the entire project only cost $35!

Use 530ts for the windows, this will give you "trap" protection on the up and you can vent or roll all the way down. Up just needs a neg lock out put and down needs an aux to either vent or bring all the way down. If I remember Toyota roof motor, cut ign feed and join from motor to the permanent 12v+ that's in that loom then you've got neg close or opening switch, no relays required.

Howie..... why does your idea seem so much easier?

'Cause it's the same as adding window roll-up/downs to a standard alarm!

howie ll wrote: Use 530ts for the windows, this will give you "trap" protection on the up and you can vent or roll all the way down. Up just needs a neg lock out put and down needs an aux to either vent or bring all the way down. If I remember Toyota roof motor, cut ign feed and join from motor to the permanent 12v+ that's in that loom then you've got neg close or opening switch, no relays required.

Sure I could have used a few 530ts for $50 each. I also could have had the job done by a professional. However, both of those options would have killed the DIY aspect of this design project and taken away some of the joy I feel when I roll down all 6 windows from 50 feet away.

The downside is that if one of the windows is faster than the other, then the time it takes to roll the rest down, that motor is still running and will eventually damage it, unless there is a factory resistance shut off to the motor. Do you have to hold the aux button, or is it timer based? I did a similar setup a while back, and ended up taking it out because it was causing my motors to stay on even when the windows were all the way down (I used a timer to control it) Its definitely a great DIY, but I would think you may want to be careful about damaging your window motors.Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205