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Subject: correction to Bruno's LKM repair page Author: shogun (moderator) : member since March, 2004 : 16310 posts Posted on: 2006-09-22 13:41:46

on his repair site Max Fretter's pics were taken from New Zealand and Max once mentioned that the 4 relais inside the LKM are for each one headlight

This is not correct:
First of all, U.S. headlights have only 3 relais,
1 for low beam headlights
1 for high beam headlights
1 for fog lights front

Non U.S. LKM's and most of the japanese version LKM's have 4 relais, the additional one is for the rear fog lights.

If you open the LKM, and the connectors face down so that you can see the relais on the board, the order is from right to left side:
low beam headlights
high beam headlights
front fog lights
rear fog lights (NOT on U.S. version).
Here you can see the opened LKM.
LKM & Relay repair at bmwe34.net

And the low beam headlight relay has 2 ON contacts!

Often one of these contacts does not work. Cleaning, resoldering helps.
Sometimes even bending the contact.

The LKM might look different from this pic, as there are various makers, it may have even 2 boards, but the function and the pins are the same.
The fuse for the low beam comes AFTER the LKM, so if the contacts are not there in the relais in the LKM, the fuse has no power. I know some people which have just soldered the 2 contacts for right and left together, but that is not the final solution.
And the headlight fuses comes after the LKM relais. So if the fuse is o.k. but there is no power, it is the relais inside the LKM.

LKM-L and LKM-B pin -out

1 High Beam stalk at steering wheel
2 terminal 30 (continious power)
3 switch low beam/dip light
4 data to CCM = check control module
5 data to CCM = check control module
6 F1 terminal R, IC supply
7 from k7 P2 - tail light right

8 tail light right
9 tail light left
10 parking light right
11 parking light left
12 from brake light switch

13 brake light left
14 switch licence plate light on
15 3rd brake light
16 fog light front left
17 F7 15A, terminal 30
18 fog light switch
19 rear fog light switch

20 high beam via fuse F13, F14
21 low beam left F10
22 low beam right F11
23 check via CCM + CC + OBC (check control module-check control-on board computer)
24 ground
25 data to CCM

26 from K7P6 tail light left
27 from K7P9 parking light right
28 from K7P5 parking light left
29 brake light right

30 licence plate right
31 licence plate left
32 fog light right, front
33 fog light right, rear
34 fog light left, rear
35 F8 15A for rear fog light

Note: this is the ECE/EU version, some pins might be missing in other versions. But the set - up will be the same. So for the US LKM probably the pins for rear fog light might not be there respect. not connected internally.
Depending on year of production and the makers of the LKM the internal parts look different, but the pins are always for the same function.

The pins in one row are 1 - 19
and the other row
20 - 35

shogun >>E32 750iL<< 11/88
7 series Tech tips
http://tinyurl.com/3486c

• correction to Bruno's LKM repair page (url) - shogun 2006-09-22 13:41:46 (7070 views)