Porsche 928 S4 Technical Specifications

Technical Data – Fuses and Relays (1989)

 Location of Fuses and Relays

The central electric board is accessible after folding up a cover in foot well of passenger’s side.  It holds 45 fuses and 26 relays.  The fuses are grouped into 5 blocks comprising 5 fuses each and are no longer numbered.  To check a special fuse it is necessary to count from left to right.

 All wire harness plug connections for the central electric board are located below the relays and marked with letters A through W.  The connectors have been fitted with coding elements to avoid confusion.

 Note:

The seat belt timer relay is located in the center console ahead of the radio, the rear window wiper relay behind the tool plate at rear left, the bulb controller in the passenger-side oddments tray.

  

Fuses Model 89

No. Amp.  
1 5 Central lock system
2 25 Cigar lighter
3 5 Control unit fan
4 7.5 Stop light, tempostat / cruise control
5 25 Windshield wipers, heated spray jet
6 7.5 Air conditioner
7 5 Light: Button panel, light switch, diagnosis connection
8 15 Seat heater
9 7.5 Telephone
10 5 Instruments, indicator lamps, solenoid valve, Kick down
11 7.5 Rear window wiper
12 7.5 Backup lights, mirror control, tire pressure control
13 15 Additional air conditioner
14 25 Sun roof
15 30 Window controls
16 15 ABS
17 30 Fresh air blower
18 15 Two-tone horn
19 25 Rear window defogger
20 30 Power seat left
21 30 Power seat right
22 15 Booster
23 7.5 Fresh air flap motor
24 7.5 Inside lights, diagnosis connection, combi
25 25 Headlight cleaner
26 1 Tailgate unlocking
27 15 Concealed headlight motor
28 30 Radiator fan 1
29 30 Radiator fan 2
30 15 Fog light
31 7.5 High beam left
32 7.5 High beam right
33 15 Additional high beam
34 5 Turn signal front left
35 5 Turn signal rear left
36 5 Turn signal front right
37 5 Turn signal rear right
38 7.5 Low beam left
39 7.5 Low beam right
40 5 Side marker light left
41 5 Side marker light right
42 15 Fuel pump, heater, Oxygen sensor
43 5 License plate light, engine compartment light
44 5 Lights: Ashtray, instruments
45 5 Rear fog light

 

 

 

 

 

Relays

I + II - Rear window defogger
III -
IV - X-Relay
V - Turn signal flasher relay
VI - Window controls
VII - Wiper intermittent action
VIII - Defroster
IX - Extensive cleaning
X - Fresh air blower
XI - Interference Suppressor
XII - Two-tone horn
XIII - Fog light
XIV - Starter
XV - Kick down (only automatic)
XVI - EZK
XVII - ABS
XVIII - Flap control
XIX - Headlight cleaner
XX - Fuel pump
XXI - Inside light
XXII - Backup light (bridge at manual transmission)
XXIII + XXIV - Light
XXV - LH-Jetronic
XXVI -