Fuse and relay box diagrams – Porsche 928
Applies to vehicles manufactured in the years:
1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995.
Fuse box
1977 – 1979
1980-1984
| Number | Description | Amps [A] |
| 1 | Fog lights | 16 |
| 2 | Traffic lights (in euros) | 16 |
| 3 | License plate lighting, comp. Lt | 8 |
| 4 | Ashtray light;
Light switches; Instrument lighting (1983-1984). |
8 |
| 5 | 1977-1980; 1982 :
Cigarette lighter, instrument light |
16 |
| 1981; 1983-1984:
Cigarette lighter, instrument light (1981) |
8 | |
| 6 | Windshield wipers, interior washers | 16 |
| 7 | 1977-1979: Rear window wiper; 1983-1984: Stop light, cruise control, bulb test. |
8 |
| 8 | Sunroof | 16 |
| 9 | Reversing light, mirror motors, air conditioning (1983-1984), rear wiper (1983-1984) | 8 |
| 10 | 1977-1982: Stop light, cruise control, bulb test | 8 |
| 11 | I8 instrument, clock, light switch lamp | |
| 12 | Instruments and indicator lights | 8 |
| 13 | 1983-1984: Fuel pump, warm-up regulator, auxiliary air valve | 16 |
| 14 | Electric seat motors | 25 |
| 15 | Horns, antenna, rear wiper return | 16 |
| 16 | A/C condenser fan | 25 |
| 17 | Fresh air blower, comp. Clutch (1977-1979) | 25 |
| 18 | Rear defroster, mirror heaters | 25 |
| 19 | Headlight motor | 25 |
| 20 | Headlight washers | 16 |
| 21 | Window motors, central locking system (1980-1984) | 25 |
| 22 | 1977-1982 : Fuel pump, warm-up control, auxiliary air valve | 25 |
| 23 | Interior lights, clock, tailgate release | 8 |
| 24 | Traffic lights – left | 8 |
| 25 | Traffic lights – right | 8 |
| 26 | Passing lights – left | 8 |
| 27 | Passing lights – right | 8 |
| 28 | Parking lights – left | 8 |
| 29 | Parking lights – right | 8 |
| 30 | Direction blinker – front/left | 8 |
| 31 | Direction blinker – rear/left | 8 |
| 32 | Direction blinker – front/right | 8 |
| 33 | Direction blinker – front/right | 8 |
| 34 | Rear fog light (Euro) | 8 |
| Number | Relay | Part No. |
| I-II | Rear defroster | 928.615.115.00 |
| III | 1977-1979: Headlight engine | 928.615.116.00 |
| 1983-1984; Euro: window elevator | 141.951.253.B | |
| IV | 1977-1979 : headlight supply | 928.615.127.00 |
| 1984; US: Alert | 141.951.253.B | |
| V | Indicator (rotation) blinker | 1H0.953.227 |
| VI | Window winder | 928.615.117,00 (’77-’80)
928.615.116,00 (’81-’84) |
| VII | Headlight washers | 928.618.111.00 |
| VIII | – | – |
| IX | 1977-1979: Seat belt | 928.618.102,00 |
| 1983-1984: Kick-Down Relay – Auto | 928.618.109.00 | |
| 1983-1984: Kick-Down BRIDGE – 5-speed | 928.615.125.01 | |
| x | Two-tone horns | 928.615.117,00 (’77-’81) 141.951.253.B (’82-’84) |
| XI | 1977-1979: A/C compressor | 928.618.105.00 |
| XII | Fog lights | 928.615.117.02 |
| XIII | 1977-1979: Traffic light power | 928.615.119.00 |
| 1980-1984: Intermittent wiper delay | 993.615.101.00 | |
| XIV | 1977-1979: High/low headlight | 928.615.123,00 |
| 1980-1984: Starting relay (automatic) | 928.615.117.00 (’80-’81) 141.951.253.B (’82-’84) |
|
| 1980-1984: Start-Bridge (manual). | 928.615.125,00 ( 1980s-81)
928.612.473.00 (years 82-84) |
|
| XV | 1977-1979: Starting relay (automatic) | 928.615.117.00 |
| 1977-1979: Start-Bridge (textbook) | 928.615.125.00 | |
| 1980-1984: Intensive washing machines | 928.618.113.01 | |
| 1980-1981: without inside washer (bridge) | 928.618.115.00 | |
| XVI | 1977-1979: Headlight safety | 928.615.116.00 |
| 1980-1984: Fuel injection | 928.615.119.00 | |
| XVI | 1977-1979 : Spotlight Safety | 928.615.116.00 |
| 1980-1984 : Fuel Injection | 928.615.119.00 | |
| XVII | Fuel pump | 928.615.113.01 |
| XVIII | A/C condenser fan | 928.615.111.00 |
| XIX | 1977-1979: Intermittent wiper delay | 993.615.101.00 |
| XIX-XX | 1980-1984: Combination headlight | 928.618.107.02 |
| XX | 1977-1979: Intensive washing machines |
928.618.113.01 |
| 928.618.115.00 | ||
| XXI | Fresh air blower | 928.615.117.00 |
| XXII | Defroster | 928.615.117.00 |
Fuse box (1985-1989)
| Number | Description | Amps [A] |
| 1 | 1985-1988: Central Locking | 5 |
| 1989 : central locking | 15 | |
| 2 | 1985-1986: Lighter | 20 |
| 1987-1988: Lighter | 25 | |
| 3 | 1987-1988 : control unit – cooling fans | 5 |
| 4 | Brake light, cruise control | 7,5 |
| 5 | 1985-1986: Windshield wipers, heating nozzle | 15 |
| 1987-1988: Windshield wipers, heating nozzle | 25 | |
| 6 | 1985-1986: Light: button panel, light switch | 5 |
| 1987-1988 : Air Conditioning | 7,5 | |
| 7 | Seat heating | 15 |
| 8 | 1985-1986: Air conditioning | 7,5 |
| 1987-1988 : seat heating | 15 | |
| 9 | Phone (factory) | 7,5 |
| 10 | Instruments, indicator lights, kick-down (auto; 1987-1988) | 5 |
| 11 | Rear window wiper | 7,5 |
| 12 | Reversing light, mirror motors | 7,5 |
| 13 | Auxiliary air conditioning (rear air conditioning) | 15 |
| 14 | Sunroof | 25 |
| 15 | Window winders | 30 |
| 16 | 1985-1986: Anti-lock braking system | 10 |
| 1987-1988: Anti-lock braking system | 15 | |
| 17 | Fresh air blower | 30 |
| 18 | Horns, rear wiper – (resting position) | 15 |
| 19 | Rear window defroster | 25 |
| 20 | Electric seat adjustment – left | 30 |
| 21 | Electric seat adjustment – right | 30 |
| 22 | 1987-1988: Radio – Amplifier | 15 |
| 23 | 1985-1986: Radiator fan runway 1987-1988: Cooling air flap adjustment |
7,5 |
| 24 | 1985-1986: Current pulse tailgate, interior lighting | 5 |
| 1987-1988: Diagnostic connector, pulse current-rear flap, interior lighting | 7,5 | |
| 25 | Headlight cleaning system | 25 |
| 26 | Tailgate release | 1 |
| 27 | Headlight motor | 15 |
| 28 | 1985-1986 : Radio amplifier | 15 |
| 1987-1988: No. 1 radiator fan | 30 | |
| 29 | 1985-1986: A/C condenser/radiator cooling fan | 25 |
| 1987-1988 : No. 2 radiator fan | 30 | |
| 30 | Fog lights | 15 |
| 31 | Main (road) beam – left | 7,5 |
| 32 | Main (road) harness – right | 7,5 |
| 33 | Traffic lights | 15 |
| 34 | Indicator (rotation) Light Front/Left | 5 |
| 35 | Direction Indicator (turn) Light Rear/Left. | 5 |
| 36 | Indicator (rotation) Light Front/Right | 5 |
| 37 | Direction Indicator (turn) Light Rear/Left. | 5 |
| 38 | Dipped (passing) lights – left | 7,5 |
| 39 | Dipped (passing) lights – right | 7,5 |
| 40 | Parking light – left | 5 |
| 41 | Parking light – right | 6 |
| 42 | Fuel pump, O2 sensor heating | 15 |
| 43 | License plate lighting, comp. Lt | 5 |
| 44 | Ashtray light, instrument lighting | 5 |
| 45 | Rear fog light (Euro only) | 5 |
| Number | Relay | Part number |
| I-II | Rear defroster | 928.615.115.00 |
| III | – | – |
| IV | Ignition Relay-X | 141.951.253.B |
| V | Indicator (rotation), 4-way blinker | 1H0.953.227 |
| VI | Window winder | 928.615.126,00 (years 85-88)
944.615.166,00 (years 89-89) |
| VII | Intermittent wiper delay timer | 993.615.101.00 |
| VIII | Defroster | 928.615.203,00 (’85-’86)
141.951.253.B (’87-’89) |
| IX | Intensive Primers | 928.618.113.01 |
| x | Fresh air blower (HVAC) | 141.951.253.B |
| XI | Interference suppressor | 928.618.223.00 |
| XII | Two-tone horns | 141.951.253.B |
| XIII | Fog lights | 928.615.137.01 (’85-’86)
928.615.117.02 (’87-’89) |
| XIV | Starter relay | 141.951.253.B |
| XV | 1985-1986: Kick-Down (automatic) relay (up to 86 VIN#0998). | 928.618.109.00 |
| 1986-1989 : Kick-Down Relay (Auto) (’86 VIN # 09999 and later). | 928.618.109.01 (’86-’88)
928.618.108,00 (’89-’89) |
|
| XVI | 1985-1986: EZF ignition system | 141.951.253.B |
| 1987-1989 : EZK ignition system (with fuse tester) | 928.615.203.00 | |
| XVII | ABS relay (USA ’86 from VIN # 0061/ Euro from ’85). | 928.615.124.01 |
| XVIII | 1985-1986: A/C condenser/radiator fan | 141.951.253.B |
| 1987-1988: Cooling air flap system | 944.615.119.00 | |
| XIX | Headlight washers | 928.618.111.00 |
| XX | Fuel pump, O2 sensor | 141.951.253.B |
| XXI | Interior lighting delay (’86 VIN # 09999 and later) | 928.618.225.01 |
| XXII | 1985-1988: Reversing light relay (automatic) | 141.951.253.B (’85-’88)
928.615.114,00 (’89) |
| 1989: reverse light bridge (5-speed) | 928.615.125.00 | |
| XXIII – XXIV | Combination headlight | 928.618.107.02 (’85-’86)
928.618.107,04 (’87-’89) |
| XXV | Left-Jetronic fuel injection | 141.951.253.B |
| XXVI | – | – |
Fuse box (1990-1995)
| Number | Description | Amps [A] |
| 1 | Dipped (passing) lights – left side | 7,5 |
| 2 | Dipped (passing) lights – right | 7,5 |
| 3 | Main (road) harness – left | 7,5 |
| 4 | Main (road) harness – right | 7,5 |
| 5 | Traffic lights | 15 |
| 6 | Fog lights | 15 |
| 7 | Parking light – left | 5 |
| 8 | Parking light – right | 5 |
| 9 | Lights: ashtray, instruments | 5 |
| 10 | Lights: license plate, comp. ( 1990 ) | 5 |
| 11 | Rear fog light (Euro only) | 5 |
| 12 | Blinker light (turn signal) – front/left | 5 |
| 13 | Blinker light (turn signal) – rear/left | 5 |
| 14 | Blinker light (turn signal) – front/right | 5 |
| 15 | Blinker light (turn signal) – rear/left | 5 |
| 16 | R25ear Window Defroster | 25 |
| 17 | 1990 : Central locking; 1991-1995 : Warning signal, comp. Light. |
7,5 |
| 18 | 1990 : Cooling air flap adjustment | 7,5 |
| 1991-1995 : Window/roof window regulator | 25 | |
| 19 | Headlight cleaning system | 25 |
| 20 | Fresh air blower | 30 |
| 21 | Radio – Amplifier | 15 |
| 22 | Electric seat adjustment – left | 30 |
| 23 | Electric seat adjustment – right | 30 |
| 24 | Horns, rear wiper-(resting position; 1990-1991 ) | 15 |
| 25 | Diagnostic connector, pulse current-rear flap, interior lighting | 7,5 |
| 26 | Tailgate release | 1 |
| 27 | Headlight motor | 15 |
| 28 | Anti-theft system | 15 |
| 29 | Radiator fan #1 | 30 |
| 30 | Radiator fan #2 | 30 |
| 31 | 1990 : Window/rail regulator. | 30 |
| 32 | – | – |
| 33 | Lighter | 25 |
| 34 | Windshield wipers, washer jet heating | 25 |
| 35 | Brake light, cruise control | 7,5 |
| 36 | Control unit – cooling fans | 5 |
| 37 | Air conditioning | 7,5 |
| 38 | Fuel pump, O2 sensor heating | 15 |
| 39 | Instruments, kick-down, warning lights, rear wiper switch | 5 |
| 40 | Reversing lights, mirror motors, RDK system | 7,5 |
| 41 | Light: light switch, pushbutton panel, interior light delay, Diag. Con. | 5 |
| 42 | Rear window wiper | 7,5 |
| 43 | Telephone (Factory) | 7,5 |
| 44 | Seat heating | 15 |
| 45 | Additional air conditioning (rear air conditioning) | 15 |
| Number | Relay | Part number |
| I-II | Rear defroster | 928.615.115.00 |
| III | Canada: daytime running lights | – |
| IV | Fog lights | 928.615.117.02 (’90)
141.951.253.B (’91-’95) |
| V | Starter relay | 141.951.253.B |
| VI | 1990 : Cooling air flap system | 944.615.119.00 |
| VII | Headlight washers | 928.618.111.00 |
| VIII | 1991-1995 : Fog light alarm | 141.951.253.B |
| IX | Intensive Pads | 928.618.113.01 |
| x | Ignition relay-X | 141.951.253.B |
| XI | Wiper delay timer | 993.615.101.00 |
| XII | Fresh air blower (HVAC) | 141.951.253.B |
| XIII | Indicator (rotation), 4-way blinker | 1H0.953.227 |
| XIV | Defroster | 141.951.253.B |
| XV | 1990 : ABS relay | 928.615.124.01 |
| XVI | 1991-1995 : two-tone horns | 141.951.253.B |
| XVII | 1990-1993 : Kick-Down relay (automatic) (to Vin#92PS8 20500) | 928.618.108,00 |
| 1993-1995 : Kick-Down Relay (Auto) (from VIN # 92PS8 20501). | 928.618.108.01 | |
| XVIII | Reversing light relay (automatic) | 928.615.114.00 |
| Reverse light bridge (5-speed) | 928.615.125.00 | |
| XIX | 1990 : Interior lighting delay | 928.618.225.01 |
| 1991-1995 : Control unit – speedometer | 928.618.221.00 | |
| XX | – | – |
| XXI | Interference suppressor | 928.618.223.00 |
| XXII | EZK ignition system (with fuse tester) | 928.615.203.00 |
| XXII | Combination headlight | 928.618.107.04 |
| XXIV | ||
| XXV | LH-Jetronic fuel injection | 141.951.253.B |
| XXVI | Fuel pump, O2 sensor | 141.951.253.B |
Additional fuses
| Description | Location | Part number |
| 1977-1981 : Electric chair | Under the seat | 928.615.123,00 |
| 1980-1995: Seat belt / Bell | Inside the center console under the radio | 928.618.102.03 |
| 1980-1995: Rear window wiper | Behind the tool kit cover – driver’s side | 928.618.104.00 |
| 1989-1995 : ignition overheat relay | Mounted on the engine computer frame | 928.618.175.00 |
| 1989-1995: Anti-theft relay | Inside the center console under the radio | 928.637.160.00 |
The article Porsche 928 (1977-1995) – fuse box comes from the site Fuseów schematics.