Bulb Failure, position light

MNM · Post by **MNM** » 10 Jul 2011, 15:21

Had this message about a month ago. Have replaced every light from rear to front. All lights are working but message still appears. any ideas how to clear message

Post by **dcarlson12** » 10 Jul 2011, 17:38

I believe you can get this message if one of a pair of bulbs has a slightly different current draw than the other. Thus it is often recommended that bulbs be changed in pairs if one is found to be burnt out. I guess this does not apply if you are certain that both bulbs of a pair are identical. Perhaps an resistance measurement is needed but I don't know how close to be 'identical' the resistance (and corresponding current draw) has to be....

537playing · Post by **537playing** » 10 Jul 2011, 17:48

Perhaps it the bulb that has a light lite under driving conditions then once you hit the brake another filament in the same bulb is failing to light. Test the rear lights with the brake off then on. You'll see which one isn't working.

MNM · Post by **MNM** » 15 Jul 2011, 14:26

Hello all, have changed all running lights, checked the fuses for position light all ok.Any more ideas? Thanks in advance

Snowman · Post by **Snowman** » 01 Aug 2011, 11:33

I had a position light message about six months ago and, never did find out what was going on. About three months ago my right HID headlight started acting up and would get stuck beaming down. Could reset the position by turning the light switch off for a few seconds then back on. Just recently on a cross state trip to Eastern Washington both headlights failed with maximum beam down. Since I do carry tools, I stopped alongside the road and played around with the headlight adjustment which I had found three months earlier so I could limp home with the headlights on high beam as they were. Looking for a solution found that the auto headlight leveling system uses inputs from front and, rear variable resistors mounted on one front and, one rear strut. I also suspect that from looking at electrical schematics on MAT's site, that the ISM (Inclination sensor module) might be in the works as well. Can not locate the ISM, does anyone know exactly where it is located ? Meanwhile I have ordered a pair of halogen OEM headlight assemblies.

Post by **dcarlson12** » 01 Aug 2011, 16:20

Here is a file from VADIS regarding the inclination sensor which is part of the rear electronic module.
Hope this helps. Let us know how you make out...

If you need other files referred to in this file, let me/us know and I can upload other files.

Post by **cassaroni** » 20 Nov 2011, 13:09

MNM wrote:Had this message about a month ago. Have replaced every light from rear to front. All lights are working but message still appears. any ideas how to clear message

How did you access the rear tailight position bulb? I pull rear inside panel off to hard to get hand up in there, i see a speaker cover
Please help

MNM · Post by **MNM** » 20 Nov 2011, 14:24

This is done from the trunk, open the trouts and on the left side is a panel, remove to access bulbs

Post by **dcarlson12** » 20 Nov 2011, 14:28

Are you talking about middle brake light?

MNM · Post by **MNM** » 28 Nov 2011, 13:22

Hello all, am back with my issue regarding the message " bulb failure position light". All electrical fuses and bulbs work fine but message still remains. Could it be a fault with the CEM? And do i need a software reload? Don't want to do this if it will cause any other problems. Any advice on this please