Does the LKM box lift out? Does it unclip? I'm hesitant to unclip it for fear of breaking something.
My BMW is a July 92 build. The LKM black box does not appear to lift out of the fuse box compartment?
If I manage to remove the LKM box am I looking for dry joints? Are the reversing lights and license plate bulbs all wired through the LKM? Just find the dry joints and touch them with a soldering iron and solder?
Any idea where the reverse lights and license plate circuits are located on the LKM PCB?
Have you checked the fuses Nos. 12, 15 and 5? And the bulbs
Are the wires for your licence plate lights grey/brown for the left and grey/brown/yellow for the right?
There is a 30 pin yellow plug I think where the wiring routes down below the dash on the passengers side. I would check for voltage between a good earth and the above mentioned wire colours at this plug to determine if power is at least coming from the module when you switch on the lights.
Are the wires for your reverse lights blue/yellow? The reverse lights are not operated by the module. I think there is a black 30 pin plug in the same area and you should check for voltage at the blue/yellow wire with reverse gear engaged and ignition on. There should also be a splice connector under the rear seat where you could also check for voltage on the blue/yellow wire.
If both of these checks show you have voltage then I would say you need to check the harness where it passes from the body to the tailgate.
I've just discovered that the main wiring loom cable was cut clean through at some stage in the cars earlier life and the wires reconnected. It was stuffed away out of sight up in the roof recess.
All I need to do now is determine which wires have gone open circuit and make good. It looks rather like spagetti junction but I'm sure I'll be able to get it all up and running with 100% functionality.
Just to let you all know and thank you for your assistance. I soldered the broken wires together and taped up all exposed metal with insulation tape. Reversing lights and license plate lights are now fully functional.
If you put your mind to it you can do it!
Last edited by BMWJOYMACHINE; 24-04-2010 at 15:00.
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