Somewhere there should be an IC which opens the switch when the window is all the way down.
It's my understanding that the way these work, there's a small microcontroller which senses when the down switch is pushed, then sends power to the motor (via a relay or power mosfet) while monitoring the motor current. When the window stops at the bottom and the motor stalls, the motor current will rise quickly. When the micro sees the current rise, it opens the relay/mosfet.
I don't want to be discouraging, but there's a fair amount of engineering to hack that into the controls, and even more to do it on both switches for the passenger side window.
Doing it only the the driver's side switch for the passenger window might cut the challenge down to something more manageable. But even then, it strikes me as being difficult. Trying to reverse engineer what's on the driver's window, and then copy-hack that for the other side could find you putting lots of hours into it, and maybe it still not work.
The key is finding a schematic that shows the hookup between the switches, the relay/mosfet and the micro. It's been a while since I saw one, but I want to say the micro was inside the switch housing on one of these I had. But I can't recall which of my cars that was on
Can you post a pic of the backside of that board? Do you have a power windows hookup schematic for your car?
Doug
.
It's my understanding that the way these work, there's a small microcontroller which senses when the down switch is pushed, then sends power to the motor (via a relay or power mosfet) while monitoring the motor current. When the window stops at the bottom and the motor stalls, the motor current will rise quickly. When the micro sees the current rise, it opens the relay/mosfet.
I don't want to be discouraging, but there's a fair amount of engineering to hack that into the controls, and even more to do it on both switches for the passenger side window.
Doing it only the the driver's side switch for the passenger window might cut the challenge down to something more manageable. But even then, it strikes me as being difficult. Trying to reverse engineer what's on the driver's window, and then copy-hack that for the other side could find you putting lots of hours into it, and maybe it still not work.
The key is finding a schematic that shows the hookup between the switches, the relay/mosfet and the micro. It's been a while since I saw one, but I want to say the micro was inside the switch housing on one of these I had. But I can't recall which of my cars that was on
Can you post a pic of the backside of that board? Do you have a power windows hookup schematic for your car?
Doug
.
