Though I have a MY 1995 480 with a CEM-III, I have a friend with a MY 1989 480 ES who is equally keen with electronics as I am, and he has more or less reverse engineered the CEM-01 pinout and put it in a Google doc we are both maintaining. Very handy, where there's an internet connection, I have all pinouts in my pocket! (Ha! I have fooled you lot into thinking I am a walking 480 Wikipedia
)
Trouble is, though we are both fluent in English, we haven't got round to translating it, so it has been translated in a rush. Sorry about the formatting.
Wiring colours: Br = Brown, Bl = Blue, Wt = White, SB = Black, R = Red, Gr = Grey, Gn = Green, Y = Yellow
Pin Wire colour Description
A1 nc n/a
A2 Br-Bl Switch door lock drivers side
A3 Wt-Br Warning (Hazard light?)
A4 Bl Diagnose (CEM-01 only)
A5 Br Ground
A6 SB Seat belt
A7 R-Bl Door open drivers side
A8 SB-Br Horn switch
A9 Gr-Gn Switch windscreen washer rear
A10 SB-Gn Windscreen washer rear connector 4
A11 Gn-Br Windscreen washer rear connector 3
A12 Bl-Gr Main beam left fuse 8
A13 nc n/a
A14 Gr-Wt Fuse 19
A15 Y-Br Standing light right fuse 11
A16 Br-Gr Rear light switch "8"
A17 Gn Wiper motor
A18 Wt-Br Switch wiper/washer "J"
A19 Br-Gr Switch door lock passengers side
A20 SB-R Rear windscreen heater switch "6"
A21 Y-SB Check door open
A22 Y-Br Passenger seat belt check
A23 nc n/a
A24 Y-Wt Door open passengers side
A25 Bl-SB Switch lock rear hatch
A26 Bl-Y Auxiliary beam switch through main beam
A27 Gr-Gn pin 85 VEM
A28 Br-R alternator from battery light instrument cluster
A29 Gn Rear wiper through diode
A30 R +12V battery
A31 nc n/a
A32 Wt-SB interior light and reading lights
A33 Wt ?
A34 Bl-Gr Low beam through fuse 6
A35 Wt-Gn ?
B1 Gl-Wt 12V fuse 15
B2 Gn-Br 12V fuse 17
B3 Gl-Wt Rear window heater and mirror heater
B4 Gn-Br Output flasher relay to direction indicator switch
C1 Or 12V fuse 14
C2 Gl-Bl 12V fuse 16
C3 Wt-Bl 12V fuse 23 through ignition relay +75
C4 Wt-Br Full throttle signal
C5 nc n/a
C6 Wt-Gr 12V fuse 18
D1 nc n/a
D2 SB-R Microswitch in bonnet lock
D3 Gr-R Horn
D4 W-Gr Resting position windscreen wiper
D5 W-Gr Headlight washer pump
D6 Bl-Y Auxiliary beams
D7 Or A/C compressor
D8 Br Ground