Ok. Does anybody know the location of the memory seat module? That is, is it separate from the seat computer? I ask because I found out a few things. One was a tip:

"-W126 fuse for trunk light and memory seats keeps blowing: the wiring harness near the trunk hinge flexes all the time, and the wires have shorted. Pull the wires and electrical tape them, and you'll be fine."

Why would the memory seats be dependent on trunk wiring? So i looked and found nothing in particular. But I did find a wiring harness along the body line that was taped to the antenna. When I removed it and pulled it apart I found four wires. Two were red with white stripe. Twisted together. Upon separation, trunk light went out. The other was a brown ground (cut and unattached) and the last was a light blue going nowhere.

But I am not sure where they would even go in the first place except to a module or plug. Especially odd is the trunk light. Why run a harness down then back up to the back of the seat then again to the trunk. And its a factory wrapped harness. So clearly there is a reason this is where it is. But no module, no connector and no clue whats up with the blue wire. Got no voltage off of it. Note: Stereo system was hacked to high heaven. Antenna wires were also wrapped up in this. They may have used this harness end for antenna power. Pic of hacked wire harness:



And then I also found this long ago. I am pretty sure that only one is in the car on the drivers side. Given that the harness seems to hide under the heat vent, I am not sure of there is an open harness on the passenger side. At one time that seat was disconnect and when I hooked it up in went into a loop. So it had issues which I sorta fixed (hooked up and works). But they may have removed this box to try to make the seat stop looping. Anyway, I took it off and apart. It has the same relays used in the seat control boxes. And everything is doubled up in pairs, so it may be the controller and it may control both seats. I am going to re-solder the board tonight and see if it helps. But it sure looks ok, no burnt stuff. Pics:





I guess at this point I am more curious about the blue wire and where it may have gone.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car