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.
The assignment of fuses and relays may differ from that shown, depending on the year of manufacture and the level of electrical equipment.
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.
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
Diagrams
Relay
| Relay no. | Appointment |
| K2 | Horn bmw e34 |
| K3 | Removing voltage from terminal R |
| K4 | Heater fan / parking heater |
| K5 | Intensive cleaning / washer pump |
| К6 | SRA module |
| К8 | Relay auxiliary water pump bmw e34 |
| K9 | Removing voltage from terminal 15 |
| K10 | Overload protection of the ABS / ASC system |
| К16 | Relay breaker alarm 30/30 |
| К18 | Decoupling air conditioning * Motronic |
| К19 | Air conditioning compressor |
| K21 | Switching on the 1st speed of the auxiliary fan |
| K22 | Switching on the 2nd speed of the auxiliary fan |
| K40 | Relay for low beam headlights bmw e34 |
| К41 | Turning on the high beam headlights |
| K42 | Turning on the fog lights |
| K43 | Turning on fog lights |
| U4 | Anti-theft alarm sensor 30/30 |
Fuse designation
| No. | Protected target | |
| 1 | 15 | Brake light switch Brake control circuit, Tempo mat control unit, Tempo mat switch |
| 2 | 7.5 | Lighting module (relay for switching on low and high beam headlights) |
| 3 | 7.5 | Lighting module (relay for turning on fog lights, relay for turning on rear fog lights, turn signal switch, high beam warning switch |
| 4 | 7.5 | Lighting module (parking and side light on the left) |
| 5 | 10 | Lighting module (parking and side light on the right, license plate lights), cigarette lighter light , radio, engine compartment lighting, hazard warning switch |
| 6 | 7.5 | Alarm |
| 7 | 15 | Fog lights |
| 8 | 7.5 | Right and left fog lights |
| 9 | 15 | Horns, A / C compressor control unit, A / C auxiliary water pump |
| 10 | 7.5 | Left low beam headlamp |
| 11 | 7.5 | RH low beam headlamp |
| 12 | 15 | Heated washer nozzles, reversing light switch, mirror adjustment (switch) |
| 13 | 7.5 | Left high beam headlamp |
| 14 | 7.5 | High beam headlight, right |
| 15 | 7.5 | Wiper switch relay, lighting module RA 15 |
| 16 | 30 | Heated front seat, lumbar support drive |
| 17 | 7.5 | Instrument cluster (battery discharge warning lamp, warning lamps, main module). on-board computer, gear indicator |
| 18 | 15 | Infrared module, seat adjustment drive, belt ejector, central locking, radio, cordless telephone |
| 19 | 30 | Bmw e34 heater blower fuse |
| 20 | 7.5 | Instrument cluster, on-board computer, digital clock, timer |
| 21 | 30 | Interior lighting, glove compartment trunk, battery connector |
| 22 | 30 | Windshield wiper motor (modes 1 and 2). brush pressure regulator (only for models with high pressure cleaning system) |
| 23 | 7.5 | Fuel pump |
| 24 | 15 | Washer pump, wiper / washer control unit. relay for switching on the wiper motor |
| 25 | 30 | Additional fan (speeds 1 and 2) |
| 26 | 30 | Bmw e34 cigarette lighter fuse |
| 27 | 30 | Heater solenoid valve, Hi-Fi audio system with power amplifier |
| 28 | 15 | Servotronic system |
| 29 | 7.5 | Relay for turning on the rear window heater, air conditioning compressor control unit, auxiliary fan relay. ABS control unit |
High Version
Diagram
Relay assignment
| Relay number | Appointment |
| К1 | Not available with manual gearbox (contacts 30 and 87 closed) |
| К1 | Starter lock (with automatic transmission) |
| K2 | Sound signals |
| K3 | Removing voltage from terminal R |
| K4 | Heater fan / parking heater |
| K5 | Intensive cleaning / washer pump |
| К8 | Additional water pump |
| K9 | Removing voltage from terminal 15 |
| K10 | Overload protection of the ABS / ASC system |
| К16 | Alarm breaker |
| К31 | Turning on the cigarette lighter (or closed contacts 30 and 87) |
Fuse decoding
| No. | Appointment | |
| 1 | 15 | Brake light switch, brake control circuit, ABS. tachometer, lighting module, Tempo mat |
| 2 | 7.5 | Exterior light switch fuse (terminal 56), bmw 525 headlamp high beam module. |
| 3 | 7.5 | Fog lamp switch. lighting module (relay for turning on fog lights), turn signal switch, high beam warning switch |
| 4 | 7.5 | Lighting module (parking and side light on the left) |
| 5 | 10 | Lighting 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 |
| 6 | 7.5 | Direction indicators and hazard warning lights bmw 525 |
| 7 | 15 | Fog lights |
| 8 | 7.5 | Right and left fog lights |
| 9 | 15 | Horn relay, A / C compressor control unit A / C auxiliary water pump |
| 10 | 7.5 | Left low beam headlamp |
| 11 | 7.5 | RH low beam headlamp |
| 12 | 15 | Heated washer nozzles. reversing light switch, door mirror adjustment (switch) |
| 13 | 7.5 | Left high beam headlamp |
| 14 | 7.5 | High beam headlight, right |
| 15 | 7.5 | Relay for switching on the wiper, on-board computer, parking heater |
| 16 | 30 | Heated front seat drive lumbar support “ |
| 17 | 7.5 | Instrument cluster (battery discharge warning lamp, warning lamps, main module), on-board computer, gear indicator |
| 18 | 15 | Radio receiver (aerial amplifier), infrared module, seat adjustment drive, cordless telephone |
| 19 | 30 | Heater fan |
| 20 | 7.5 | Instrument cluster, on-board computer, timer, parking heater, heater |
| 21 | 30 | Interior lighting, trunk, glove box; battery charge connector |
| 22 | 30 | Windshield wiper pressure regulator, windshield wiper system |
| 23 | 7.5 | Fuel pump |
| 24 | 15 | Interior temperature control system |
| 25 | 30 | Additional fan (speeds 1 and 2) |
| 26 | 30 | Cigarette lighter |
| 27 | 30 | Heater solenoid valve, Hi-Fi audio system with power amplifier |
| 28 | 15 | Servotronic system |
| 29 | 7.5 | Air 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.
Protected components
- Headlamp / fog lamp cleaning control module
- Fan control relay – high speed
- Fan control relay – low speed
- Ringtone Relay
- Air conditioning control relay
- 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.
Description of elements
- ABS or ASC control module
- Engine control module (Motronic)
- Cruise control module
- System (main) relay
- Fuel pump relay
- 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.
Diagram
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
| Appointment | Fuse number |
| Anti-theft system | 33, 34 |
| Double tilt-slide sunroof | 32, 37 |
| Power windows | 32, 37 |
| Rear wiper | 44 |
| Heated rear window | 35 |
| Interior lighting | 32, 37 |
| Rear headrests | thirty |
| Electric steering column | 41 |
| Radio | 36 |
| Front wiper | 34 |
| Adjusting the driver’s seat | 42 |
| Adjusting the position of the passenger seat | 43 |
| Door closers | 44 |
| Sun shade | 31 |
| Telephone | 40 |
| Heated door locks | 37 |
| central locking | 32, 33, 34, 37 |
Hight Version
| Consumer | No. |
| Anti-theft system | 33, 34 |
| Double tilt-slide sunroof | 32.37 |
| Electric windows | 32.37 |
| Rear wiper | 44 |
| Heated rear window | 35 |
| Interior lighting | 32.37 |
| Rear headrests | thirty |
| Electric steering column | 41 |
| Radio | 36 |
| Front wiper | 34 |
| Adjusting the driver’s seat | 42 |
| Adjusting the position of the passenger seat | 43 |
| Door closers | 44 |
| Sun shade | 31 |
| Telephone | 40 |
| Heated door locks | 37 |
| central locking | 32, 33, 34, 37 |
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Where is the highbeam relay located for the e34 1991 535i ?
having a problem letting windows back up and sunroof want open or close
How can I tell what model my bmw 320i se is whether it is a e34 e36 etc
Fuel pump relay is 15A not 7.5A
Great work, thanks a lot.
There are a lot of variations dep on continent, year and engine choice, so even if this is not going to help everyone, this sure is a good looking place to start!!!
Hi … My BMW 525, E34 / 1991. All signal lights (right & left) stopped working at the same moment. What should I check, which relay and which fuse.
Thank you in advanced.
My battery is draining. Which relay or fuse should I check?
My aftermarket Angel Eyes right low beam stopped working on my 1989 E34. Where should I start since no auto shop seem to have an answer.