Cars / e32 / Electronics / Fuse and E-box Overview

Fuse and E-box Overview

Article by: Johan

Article applies to: all e32 and e34 models


The layout for the fuse box is for my 1987 model 735i. Apparently this is valid from 10/86 to 09/87.

There have been many changes in the electronics of the E32 during production so there are also various fuse box lay-outs.

The same goes for the e-box.

Fuse No.AmpsCircuit
17.5Windshield wipers, Gasoline heater, Instrument Cluster
27.5Low-Beam light, High-Beam light
37.5Flashers, Front Fog lights, Rear fog lights
47.5Left Parking Light
510Right Parking Light, Lighting of controls, License plate light.
67.5Warning indicators
715Front Fog light
87.5Rear Fog light
915Horn, Washer pump, Front window heater, Aircon compressor
107.5Left low-beam
117.5Right low-beam
1215Electrical mirrors, Reversing lights, Window washer nozzle heater
137.5Left High-beam
147.5Right High-beam
157.5Brake lights, Cruise control
1630Front seat heater
177.5Instrument cluster, automatic gearbox, Anti-theft alarm.
1815Radio, Phone, Anti-theft alarm
1930Blower motor
207.5Instrument cluster, heater
2115Interior lighting, Glovebox light, Trunk lights, Radio, Flashlight socket
2230Windshield washer system
237.5Fuel pump 1
247.5Fuel pump 2
2530Auxilary fan
2730Rear electric seats
297.5Aircon compressor, washer pump, ABS, rear window defroster, auto dimming mirror, ride height adjustment
307.5Central locking - driver's door
317.5Central locking - all other doors and trunk lid.
3215Automatic seatbelt release
337.5Climate control

Relays: (from top left to bottom right)
1. Starter relay
2. OBC Horn
3. Terminal R?
4. Blower motor
5. Windshield washer pump
6. Head and fog-light cleaning module
7. LKM Parking light
8. Aux defogger, aux coolant pump
9. Terminal 15
10. ABS Voltage relay

Modules: (from top to bottom)
Checkcontrol Unit
Light control module


The E-box is located on the other side of the engine bay. The box is closed with four screws:


It contains (from left to right):

The Motronic computer or DME
The Cruise Control unit
The Fuel Pump (orange) and DME main (white) relays
The ABS computer

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