FYI/DIY - E23 ECE fuse box layout, late ATO blade style.

[Hit Man X]

This is for the second generation aka face lift European E23s. If anyone has the information for the torpedo style fuses in the early E23s (think W126 Mercedes or E28s), post up the information too please.

More often than not these cars are full of hack repairs over the years, verify you have the correct fuse ratings in your box... in the correct order. It is different than the US box.



1 - 7.5A Left high-beam headlight (K3 relay)
2 - 7.5A Right high-beam headlight (K3 relay)
3 - 15A Auxiliary fan, low speed (K1 relay)
4 - 15A Turn indicators
5 - 25A Wipe-wash, headlight cleaning and intensive windscreen cleaning systems (K10 relay)
6 - 7.5A Stop lights (15A with additional stop lamp), automatic cruise control
7 - 15A Horn (K2 relay)
8 - (no function/blank)
9 - 15A Engine electronics and diagnostics
10 - 7.5A Instruments, on-board computer, Check Control
11 - 15A Fuel pump/delivery pump
12 - 7.5A Radio
13 - 7.5A Left low-beam headlight (K4 relay)
14 - 7.5A Right low-beam headlight (K4 relay)
15 - 7.5A Rear fog lights
16 - 30A Heater blower, air conditioner (K5 relay)
17 - 15A Reversing light, remote-control mirrors, mirror heating, auxiliary fan, air conditiong, 1st and 2nd stage of temperature switch, speed-range indicator for automatic transmission
18 - 30A Auxiliary fan, high speed (K6 relay)
19 - 25A Sliding/vent roof, seat heating (K7 relay)
20 - 25A Rear window heating elements (K7 relay)
21 - 7.5A Interior, glove box and uggage compartment lights, hand lamp, clock, radio memory, on-board computer
22 - 7.5A Side, rear and parking lights (left)
23 - 7.5A Side, rear and parking lights (right), license plate and instrument lighting, make-up mirror and engine-compartment lighting
24 - 15A Hazard warning flashers
25 - 30A Self-leveling suspension
26 - 30A Seat adjustment, electric window lifts
27 - 25A Central locking, door lock heating, alarm system
28 - 25A Cigarette lighter, power radio antenna, independent heater, adjustable rear seats
29 - 7.5A Left fog light (K8 relay)
30 - 7.5A Right fog light (K8 relay)

[Area52]

[Jay535is]

I made a double sided card with a picture of the fuse box with numbers, and the ratings on the other side, all covered in packing tape like WT lamination.
Keep in in the glove box.

[kelevra]

im looking to check my fuel pump relay to see if its bad, car will crank but not start, when it starts it runs for maybe a second then dies. checked the fuel pump fuse and its good.

where can i find this relay? i've searched everywhwere and nothing is really coming up in my favor

[DesktopDave]

im looking to check my fuel pump relay to see if its bad, car will crank but not start, when it starts it runs for maybe a second then dies. checked the fuel pump fuse and its good.

where can i find this relay? i've searched everywhwere and nothing is really coming up in my favor

Start a new thread!
Which year is your E23? On my '84, the FP relay is clipped to the outside of the fuse box, along with the main relay. I've had other BMWs where it's mounted above the glove box, inside the car. Check out the wire colors coming into the relay socket - the main relay will have a thick red wire coming in, and a red/white wire going to the FP relay. The FP relay has green/yellow coming in and green/violet wire heading out to power the pumps. Check the in-tank lift pump wiring connector too - they have a habit of pulling apart internally.

- - - Updated - - -

This is for the second generation aka face lift European E23s. If anyone has the information for the torpedo style fuses in the early E23s (think W126 Mercedes or E28s), post up the information too please.

More often than not these cars are full of hack repairs over the years, verify you have the correct fuse ratings in your box... in the correct order. It is different than the US box.

BTW - thanks again for this chart, it really helped me out. I'm sure it's been very helpful to other E23'ers.

[SHOoff11]

I believe "K10" is the wiper motor relay, and mine is missing this. This would be the reason my windshield washers work, but not my wipers, correct?

[Hit Man X]

I would say affirmative. That is the wiper interval relay.