Diagrams of fuse boxes and relays – BMW 3 E30

Applies to vehicles manufactured in the years:

1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994.

Fuse box in the engine compartment

The fuse box (junction box) with spare fuses, relays and plastic tweezers is located in the engine compartment on the left hand side near the windshield.

Description

1.7.5 Left high beam
2. 7.5 Right high beam
3. 15 Auxiliary engine cooling fan motor (low speed)
4. 15 Direction
indicators 5. 25 (30) Wiper, washer and headlight motors
6. 7.53 Brake bulbs. Programmable speed controller (cruise control)
7. 15 Sound signals
8. 25 (30) 2 Rear window heater
9. 7.5 (15) Electrical equipment for carburetor engines. or Reversing lamps. (Electrical equipment for carburettor engines. Reversing lamps. Gear shift indicator for automatic gearbox)
10.7.5 Controls. On-board computer or control devices. On-board computer. Reversing lamps
11. 15 Electric fuel pump. Electric engine injection pump
12. 15 Radio. On-board control system.  Control devices
13.7.5 Left dipped beam
14.7.5 Right dipped beam 15.7.5  Rear (fog) lights
16. 15 Driver’s seat heater 17.25  (30) 2 Electric sunroof
18.30 Electric motor of additional engine cooling fan (at speed working)
19.15 (30) 2 Electric motor and heating element of outside rearview mirror
20. 30 Electric motor for the heater fan. Air conditioning system
21.7.5 Interior lamps. Glove box lighting lamp. Portable lamp. Clock. Radio receiver (station memory device). Trip computer
22. 7.5 Side lamps in the left headlight, left rear light 23. 7.5 Side lamps in the right headlight, right rear light. Instrument lighting lamps. Number plate lighting
24. 15 Direction indicators in emergency mode
25. Spare
26. Spare
27. 25-30 Locking system. Heating elements for door locks.  Anti-theft system. Door locking system.  Heating elements for door locks. Anti-theft system. Trip computer buzzer 28.25
(30) 2  Cigarette lighter.  Electric drive of the antenna.Auxiliary heater motor
29.7.5 Left fog lamp
. 30.7.5 Right fog lamp

Relay

1. Normal speed relay / standby;
2. Sound signal;
3. High beam relay;
4. Dipped beam relay;
5. Not used;
6. Fast Relay / Standby;
7. Reserve;
8. Fog lamp relay;
9. Reserve;
10. Mat.