Bmw e34 – fuse and relay

BMW E34 is another modification of the body of the BMW 5 Series. This series was produced in 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994 and 1995. We will consider the locations of the BMW E34 relay and fuse boxes, their diagrams and the purpose of the elements.

bmv e34

On the BMW E34, there are two versions of the wiring, High Version and Low Version (considering models with an M50 motor or with Siemens or Bosch engine control electronics). The main difference is the installed self-diagnosis system – the dashboard is equipped with a scrolling display.

Difference between versions

You can also determine the version by looking at the fuse box under the hood. If in the lower rows there are large boxes CCM (Check control module) and LKM (Light control module), then this is the High Version, if there are ordinary square relays, then this is the Low version.

Engine compartment

Mounting box

It is located almost under the glass itself. Simply slide the latches to access. Here are fuses No. 1 – 29 and relay boxes.

Low Version

Low V block under the hood

Diagrams

block diagram u34

Relay

Relay no.Appointment
K2Horn bmw e34
K3Removing voltage from terminal R
K4Heater fan / parking heater
K5Intensive cleaning / washer pump
К6SRA module
К8Relay auxiliary water pump bmw e34
K9Removing voltage from terminal 15
K10Overload protection of the ABS / ASC system
К16Relay breaker alarm 30/30
К18Decoupling air conditioning * Motronic
К19Air conditioning compressor
K21Switching on the 1st speed of the auxiliary fan
K22Switching on the 2nd speed of the auxiliary fan
K40Relay for low beam headlights bmw e34
К41Turning on the high beam headlights
K42Turning on the fog lights
K43Turning on fog lights
U4Anti-theft alarm sensor 30/30

Fuse designation

No.Protected target
115Brake light switch Brake control circuit, Tempo mat control unit, Tempo mat switch
27.5Lighting module (relay for switching on low and high beam headlights)
37.5Lighting module (relay for turning on fog lights, relay for turning on rear fog lights, turn signal switch, high beam warning switch
47.5Lighting module (parking and side light on the left)
510Lighting module (parking and side light on the right, license plate lights), cigarette lighter light , radio, engine compartment lighting, hazard warning switch
67.5Alarm
715Fog lights
87.5Right and left fog lights
915Horns, A / C compressor control unit, A / C auxiliary water pump
107.5Left low beam headlamp
117.5RH low beam headlamp
1215Heated washer nozzles, reversing light switch, mirror adjustment (switch)
137.5Left high beam headlamp
147.5High beam headlight, right
157.5Wiper switch relay, lighting module RA 15
1630Heated front seat, lumbar support drive
177.5Instrument cluster (battery discharge warning lamp, warning lamps, main module). on-board computer, gear indicator
1815Infrared module, seat adjustment drive, belt ejector, central locking, radio, cordless telephone
1930Bmw e34 heater blower fuse
207.5Instrument cluster, on-board computer, digital clock, timer
2130Interior lighting, glove compartment trunk, battery connector
2230Windshield wiper motor (modes 1 and 2). brush pressure regulator (only for models with high pressure cleaning system)
237.5Fuel pump
2415Washer pump, wiper / washer control unit. relay for switching on the wiper motor
2530Additional fan (speeds 1 and 2)
2630Bmw e34 cigarette lighter fuse
2730Heater solenoid valve, Hi-Fi audio system with power amplifier
2815Servotronic system
297.5Relay for turning on the rear window heater, air conditioning compressor control unit, auxiliary fan relay. ABS control unit

High Version

hight v block under the hood

Diagram

schema for hight version

Relay assignment

Relay numberAppointment
К1Not available with manual gearbox (contacts 30 and 87 closed)
К1Starter lock (with automatic transmission)
K2Sound signals
K3Removing voltage from terminal R
K4Heater fan / parking heater
K5Intensive cleaning / washer pump
К8Additional water pump
K9Removing voltage from terminal 15
K10Overload protection of the ABS / ASC system
К16Alarm breaker
К31Turning on the cigarette lighter (or closed contacts 30 and 87)

Fuse decoding

No.Appointment
115Brake light switch, brake control circuit, ABS. tachometer, lighting module, Tempo mat
27.5Exterior light switch fuse (terminal 56), bmw 525 headlamp high beam module.
37.5Fog lamp switch. lighting module (relay for turning on fog lights), turn signal switch, high beam warning switch
47.5Lighting module (parking and side light on the left)
510Lighting module (parking and side light on the right, license plate lights), shading in the interior rearview mirror, lighting for cigarette lighter, cassette box, mirror, seat heater switch and lumbar support switch
67.5Direction indicators and hazard warning lights bmw 525
715Fog lights
87.5Right and left fog lights
915Horn relay, A / C compressor control unit A / C auxiliary water pump
107.5Left low beam headlamp
117.5RH low beam headlamp
1215Heated washer nozzles. reversing light switch, door mirror adjustment (switch)
137.5Left high beam headlamp
147.5High beam headlight, right
157.5Relay for switching on the wiper, on-board computer, parking heater
1630Heated front seat drive lumbar support “
177.5Instrument cluster (battery discharge warning lamp, warning lamps, main module), on-board computer, gear indicator
1815Radio receiver (aerial amplifier), infrared module, seat adjustment drive, cordless telephone
1930Heater fan
207.5Instrument cluster, on-board computer, timer, parking heater, heater
2130Interior lighting, trunk, glove box; battery charge connector
2230Windshield wiper pressure regulator, windshield wiper system
237.5Fuel pump
2415Interior temperature control system
2530Additional fan (speeds 1 and 2)
2630Cigarette lighter
2730Heater solenoid valve, Hi-Fi audio system with power amplifier
2815Servotronic system
297.5Air conditioning compressor control unit, auxiliary fan relay, ABS control unit

In both versions, fuse number 26 at 30A is responsible for the cigarette lighter.

Additional boxes

The availability of these blocks depends on the configuration and the year of manufacture of your BMW.

The first additional relay box is located in the engine compartment on the left in the direction of travel, closer to the front of the vehicle. On later models, it also contains some fuses.

additional-block

Protected components

  1. Headlamp / fog lamp cleaning control module
  2. Fan control relay – high speed
  3. Fan control relay – low speed
  4. Ringtone Relay
  5. Air conditioning control relay
  6. Circuit breakers

The second electronic unit is located in the near right corner in the direction of travel, directly under the windshield. It is closed with a plastic cover with four screws. This box contains the main control modules: engine, ABS, fuel system and electronic throttle (EML), if installed.

e-box-e34

Description of elements

  1. ABS or ASC control module
  2. Engine control module (Motronic)
  3. Cruise control module
  4. System (main) relay
  5. Fuel pump relay
  6. Heated oxygen sensor relay (lambda probe)

Passenger compartment

The box is located under the rear seat. There are fuses number 30 – 54. It looks something like this.

real photo of the block

Diagram

general scheme

Relay description

  • K30 Relay for switching on internal lighting
  • K29 Relay TSH
  • K13 HHS relay
  • A40 Control unit for wipers and washers
  • A30 Central locking control unit

Assignment

Low Version

AppointmentFuse number
Anti-theft system33, 34
Double tilt-slide sunroof32, 37
Power windows32, 37
Rear wiper44
Heated rear window35
Interior lighting32, 37
Rear headreststhirty
Electric steering column41
Radio36
Front wiper34
Adjusting the driver’s seat42
Adjusting the position of the passenger seat43
Door closers44
Sun shade31
Telephone40
Heated door locks37
central locking32, 33, 34, 37

Hight Version

ConsumerNo.
Anti-theft system33, 34
Double tilt-slide sunroof32.37
Electric windows32.37
Rear wiper44
Heated rear window35
Interior lighting32.37
Rear headreststhirty
Electric steering column41
Radio36
Front wiper34
Adjusting the driver’s seat42
Adjusting the position of the passenger seat43
Door closers44
Sun shade31
Telephone40
Heated door locks37
central locking32, 33, 34, 37

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