BMW 5 Series E39 Light Problems

Anyone who owns a BMW 5 Series E39 model may have this obstacle. Headlight failures tend to appear somewhere in the 1998 and 1999 model years. There seems to be a problem with the offside domain beam headlights staying on permanently regardless of whether the ignition is on or off or the headlight switch is in the completely off position. ..

When this failure happened, I had the lights on for a while, and when I pulled them up and went to turn them off again, I noticed that the main beam just didn’t go out. I had to go home and work, but when I got back to the car in about 10 minutes, the battery was dead. After calling the breakdown service, the man restarted the car, did a lot of tat, and then said, “Yes, it could be a BM mate, but it’s probably just a relay or something clogged.” I did. As a simple remedy, I took out the light bulb, went home, and pondered the puzzle all night.

The next morning, I decided that it needed to be a broken relay, so I searched around the car looking for a light relay. I confirmed the location in the handbook. I removed the panels here and there, literally removed all the fuses and relays I found, pulled them all out, and put them back in again. And guess what the lights aren’t going out yet. So I started looking for the answer on the web. When I visited most of the BMW forums I found, I found several owners who seemed to have the same problem. Some of the answers that came back were very similar, some people said it had to be a relay, someone suggested removing the battery for 10 minutes and then reconnecting it, And it’s all reset again and everything should be OK. I tried the battery idea, but it didn’t work either. So, in the next week or so, I went back to the web again, finally saying that someone tried them, and finally gave up and took the car to a BMW dealer. , BMW said that there are no relays to control the lights and all the lights are controlled by the “LCM”.

Currently, “LCM” is a light control module that controls all lights. If this LCM fails, it needs to be replaced. simple! Excluding LCM, it is only BMW’s main dealer parts and costs over £ 200. At the time, £ 200 wasn’t my pocket option, so I drove for the next few months with the bulbs off. After that, the day of MOT began to approach, and there was still no pocket money to buy LCM. So I desperately asked my cousin if he had any ideas on how to get the car through the MOT.

He told me, “It’s a good idea not to cut the positive wire from the problematic light and then run the new wire from the other lights working on it so that they both run on the same power source.” So I did exactly what he suggested. The car went through the MOT and is still in operation for another 6 months, because we don’t have £ 200 yet.