MilfordCubicleII
Automotive
- Jul 26, 2011
- 2
How do the auto power windows work? The type that go all the way up or down just by a single momentary push of the button. What turns off the motor? I doubt it's a limit switch set up. I suspect that it detects the increased current of when the window motor stalls, and cuts power. So my question is, what device do they use that senses the increased current and either opens the circuit itself, or powers an output that could be used to open up the circuit via an NC relay?
I've googled, called several companies, but haven't found much at all. I did however find a thing that I was previously unfamiliar with, resettable fuses. They seem like they would do exactly what I want. They allow current to pass, all the way to the threshold but if the current exceeds the threshold, the fuse "pops" opening the circuit. But then the fuse automatically resets once it stops receiving power (your finger lifts off the button). The only problem is that after researching these more thoroughly, I don't believe that they actually open the circuit. I believe they simply increase their resistance thus limiting the current drawn by the circuit, which isn't what I want.
The application is electric exhaust cutouts. I want to use a factory auto up/down window switch to open and close the electric exhaust cutouts. I've never had a cutout before but my friend does and it's awesome. But I hate how you don't really *know* when the cutout is all the way open or more importantly, shut. You just kinda have to listen and hold the button for what is probably way too long for the durability of the motor. Not to mention how nice it would be to just push a button to open or close and not worry about it. And by using the window switch that does both momentary and auto, you will still be able to move the cutout from shut to wide open and everywhere in between.
I've been trying to make sense of the auto window wiring diagram for my LS on alldatadiy but I haven't cracked it yet. There are 7 wires going into the motor's wiring harness:
1. The "one touch" wire - grounded when pressed
2. Delayed accessory power (lets you roll your windows up after you've taken the key out of the ignition
3. Window up - hot when pressed
4. Window down - hot when pressed
5. "Global open/close" (lets you roll down all windows and sunroof from the remote) - PWM signal from the "door module"
6. Constant power from the PDC
7. Ground
Sounds like there's some logic going on between the motor harness and the motor. In the end, two wires power - or do not power - the motor; not seven. Also, I need to know what's going on in the door module since it's sending signals to the motor as well.
Input anyone?
I've googled, called several companies, but haven't found much at all. I did however find a thing that I was previously unfamiliar with, resettable fuses. They seem like they would do exactly what I want. They allow current to pass, all the way to the threshold but if the current exceeds the threshold, the fuse "pops" opening the circuit. But then the fuse automatically resets once it stops receiving power (your finger lifts off the button). The only problem is that after researching these more thoroughly, I don't believe that they actually open the circuit. I believe they simply increase their resistance thus limiting the current drawn by the circuit, which isn't what I want.
The application is electric exhaust cutouts. I want to use a factory auto up/down window switch to open and close the electric exhaust cutouts. I've never had a cutout before but my friend does and it's awesome. But I hate how you don't really *know* when the cutout is all the way open or more importantly, shut. You just kinda have to listen and hold the button for what is probably way too long for the durability of the motor. Not to mention how nice it would be to just push a button to open or close and not worry about it. And by using the window switch that does both momentary and auto, you will still be able to move the cutout from shut to wide open and everywhere in between.
I've been trying to make sense of the auto window wiring diagram for my LS on alldatadiy but I haven't cracked it yet. There are 7 wires going into the motor's wiring harness:
1. The "one touch" wire - grounded when pressed
2. Delayed accessory power (lets you roll your windows up after you've taken the key out of the ignition
3. Window up - hot when pressed
4. Window down - hot when pressed
5. "Global open/close" (lets you roll down all windows and sunroof from the remote) - PWM signal from the "door module"
6. Constant power from the PDC
7. Ground
Sounds like there's some logic going on between the motor harness and the motor. In the end, two wires power - or do not power - the motor; not seven. Also, I need to know what's going on in the door module since it's sending signals to the motor as well.
Input anyone?
