(02-14-2025, 05:49 PM)IMAY2023 Wrote: As far as I know; if the seat has side support, the lumbar support is controlled by the seat contort module thus requires the pin15 power.
My s90 seats are like that.
I compared my old seats to the new and you’re correct. The wiring is entirely different. I looked at the DTC’s and it shows codes for open circuit for the valve block and pump (makes sense) I compared the female seat connectors and the only difference is that the new seat has pin 15 and the old one doesn’t (also makes sense). I feeled around the back of the seat and my conclusion is that the seat has side support+4way lumbar but no massage.
But here’s where it gets confusing:
I bought the fuse robber things, put 2 5A fuses in it and plugged it into Fuse terminal 40. As I only have 1 seat swapped I crimped just 1 wire to the robber and routed it to the drivers seat. Since I don’t yet have the correct pins for the male side seat connector, I de-pinned pin 15 from the seat end connector and just wrapped the cable around it to test if the function would now work. Nothing happened. Pin 15 is a blue wire which goes to the back of the seat where it goes to the pump. I also tried to wrap the cable from the fuse box straight to the pin at the back of the seat but that did not have any effect either.
I unfortunately don’t have a multimeter to check if there’s power coming from the fuse box end or not but I will buy one tomorrow.
Is there something I’m missing here?