Schematic diagram of electric seats with memory (BMW 5 Series E28)

1 - Plug connection for connecting special equipment
2 - Passenger seat wire plug connection
3 — Plug connection of the seat memory control unit wire
4 — Seat memory control unit wire connection
5 — Seat control switch
6 — Seat back
7 — Seat horizontal adjustment mechanism
8 — Headrest
9 — Front seat height
10 — Rear seat height
11 — Plug connection for seat backrest control/seat horizontal adjustment
12 — Headrest control plug connection
13 — Seat height control plug connection
14 — Electronic control unit (under the seat)
15 — Plug connection of the seat memory control unit wire
16 — Plug connection of seat memory wire
17 — Plug connection for seat control drive
18 — Memory switch plug connection
19 — Plug connection of the seat horizontal adjustment potentiometer
20 — Plug connection for front seat height potentiometer
21 — Plug connection for rear seat height potentiometer
22 — Headrest motor plug connection
23 — Seat back potentiometer plug connection
24 — Seat back motor plug connection
25 - Memory switch
26 — Motor - seat back control
27 — Motor - headrest control
28 — Motor - rear seat height control
29 — Motor - front seat height control
30 — Motor - horizontal adjustment of seats