Static LED headlights not functioning / responding
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C43 AMG
Static LED headlights not functioning / responding
Hey guys, my static LED (single beam) headlights aren't functioning.
* Left Driver side goes on entirely upon unlocking the car (the HID beam AND daytime running LED both go on, which it's not suppose to).... and right Passenger side is not working at all.
* Light switch inside the cabin does not not have any effect on either of the lights.
Xentry error codes:
- P124088 The CAN bus has a malfunction. Bus OFF
Any suggestions on what to do next? It seems like the module that talks to the headlights/head light switch is not functioning correctly.
Is there any way to reset the CAN bus?
Maybe check for a blown fuse? does the CAN bus have a fuse?
* Left Driver side goes on entirely upon unlocking the car (the HID beam AND daytime running LED both go on, which it's not suppose to).... and right Passenger side is not working at all.
* Light switch inside the cabin does not not have any effect on either of the lights.
Xentry error codes:
- P124088 The CAN bus has a malfunction. Bus OFF
Any suggestions on what to do next? It seems like the module that talks to the headlights/head light switch is not functioning correctly.
Is there any way to reset the CAN bus?
Maybe check for a blown fuse? does the CAN bus have a fuse?
Last edited by detlev; Feb 21, 2018 at 08:26 AM.
Thread Starter
Newbie
Joined: Dec 2017
Posts: 10
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C43 AMG
If anyone has another suggestion I'll be happy to hear 
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,283
Likes: 353
From: Michigan
2017 C43 AMG
if the can bus has an error or is down you will need to find what the issue is. The headlings are on the peripheral can bus network. Green and green/white wires. The bus bar network for peripherall can is under the floor driver side in USA. passenger side for RHD vehicles.
The first thing I would do is make sure wires in headlight connector are connected and seated well and make sure headlight connector is connected well. May just have a loose connection.
If that is seated well. check the bus in the floor. But i doubt any of these would come loose. So then my guess would be you have a control module failure somewhere on the bus. a SDS system would help to pinpoint the module that failed. you will not be able to plug and play a new module as coding will be required. which you need an SDS and vedoc access for (aka dealer login)
goodluck
Thread Starter
Newbie
Joined: Dec 2017
Posts: 10
Likes: 0
C43 AMG
if you dont have a sds system you wont be able to do anything.
if the can bus has an error or is down you will need to find what the issue is. The headlings are on the peripheral can bus network. Green and green/white wires. The bus bar network for peripherall can is under the floor driver side in USA. passenger side for RHD vehicles.
The first thing I would do is make sure wires in headlight connector are connected and seated well and make sure headlight connector is connected well. May just have a loose connection.
If that is seated well. check the bus in the floor. But i doubt any of these would come loose. So then my guess would be you have a control module failure somewhere on the bus. a SDS system would help to pinpoint the module that failed. you will not be able to plug and play a new module as coding will be required. which you need an SDS and vedoc access for (aka dealer login)
goodluck
if the can bus has an error or is down you will need to find what the issue is. The headlings are on the peripheral can bus network. Green and green/white wires. The bus bar network for peripherall can is under the floor driver side in USA. passenger side for RHD vehicles.
The first thing I would do is make sure wires in headlight connector are connected and seated well and make sure headlight connector is connected well. May just have a loose connection.
If that is seated well. check the bus in the floor. But i doubt any of these would come loose. So then my guess would be you have a control module failure somewhere on the bus. a SDS system would help to pinpoint the module that failed. you will not be able to plug and play a new module as coding will be required. which you need an SDS and vedoc access for (aka dealer login)
goodluck
The ILS set has 1 pin less and different positions, so I used a wire harness/adapter , but unfortunately that was incrorect as well.
While trying to figure out which wires belong to which pins on the new set, I decided to put back my original Static ones cause i had to go somewhere. That's when the problem occurred. I'm guessing when I was testing the ILS lamps the wires got messed up and might've caused a system error / blown fuse.
If you can help me figure out which wires goes to which pins on the new set, I'd be extremely greatful as well, so far I can't figure it out. Static ones = 7 pins... yet the DUAL ILS set, 6 pins.. makes no sense to me..
What do you think? See attachment. I made this last night with as much info as i have.
Last edited by detlev; Feb 21, 2018 at 10:06 PM.
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,283
Likes: 353
From: Michigan
2017 C43 AMG
I did a headlight swap from Static to ILS.
The ILS set has 1 pin less and different positions, so I used a wire harness/adapter , but unfortunately that was incrorect as well.
While trying to figure out which wires belong to which pins on the new set, I decided to put back my original Static ones cause i had to go somewhere. That's when the problem occurred. I'm guessing when I was testing the ILS lamps the wires got messed up and might've caused a system error / blown fuse.
If you can help me figure out which wires goes to which pins on the new set, I'd be extremely greatful as well, so far I can't figure it out. Static ones = 7 pins... yet the DUAL ILS set, 6 pins.. makes no sense to me..
What do you think? See attachment. I made this last night with as much info as i have.
The ILS set has 1 pin less and different positions, so I used a wire harness/adapter , but unfortunately that was incrorect as well.
While trying to figure out which wires belong to which pins on the new set, I decided to put back my original Static ones cause i had to go somewhere. That's when the problem occurred. I'm guessing when I was testing the ILS lamps the wires got messed up and might've caused a system error / blown fuse.
If you can help me figure out which wires goes to which pins on the new set, I'd be extremely greatful as well, so far I can't figure it out. Static ones = 7 pins... yet the DUAL ILS set, 6 pins.. makes no sense to me..
What do you think? See attachment. I made this last night with as much info as i have.
