Schematic diagram of a typical speed control system (BMW 5 Series E28)

1 - Plug connector - central section of the instrument panel (26 contacts)
2 - Steering column switch
3 — Instrument panel
4 - Plug connector - range indicator
5 - Range indicator D
6 - N range indicator
7 - R range indicator
8 — Plug connector - speedometer output
9 — Connector - instrument panel (2 contacts)
10 — Plug connector - steering column switch
11 - Plug connector - special equipment
12 — Steering column switch
13 - Plug connector - rear section to center section (29 contacts)
14 — Brake light switch
15 — Plug connector - drive motor
16 — Connector - clutch switch to jumper
17 — Left brake light
18 — Right brake light
19 — Electronic control unit - speed control system
20 — Drive motor - speed control system
21 — Jumper (only for AT)
22 — Clutch switch