Internal light problem
11-05-2021, 01:56 PM
#1
Member
Thread Starter
Internal light problem
E220d 2016
When I turn the internal light on, the strip with LEDs starts to power up, goes to a max brightness and then turns off.
Only lights in the rear view mirror stays on.
Any idea what is the cause and a fix?
When I turn the internal light on, the strip with LEDs starts to power up, goes to a max brightness and then turns off.
Only lights in the rear view mirror stays on.
Any idea what is the cause and a fix?
11-07-2021, 10:43 AM
#2
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Join Date: Apr 2019
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MY'14 W212 M276 3.5NA @60kMi
trace strings out....
no one has rushed to hand you an answer, perhaps you can try to look this up yourself.
My first guess is there may be a short the control circuit is protecting itself against or the module needs some quick soldering to refresh junctions.
- Paperwork study :
I would get the schematic applicable to your car and trace things out around the light control module.
- Hands-on style:
You're going to need to dis-join all the light strips to figure what gives.
Trims are somewhat easy to remove and reuse without any broken plastics.
+++++ LIN Strings:
it would be interesting to figure if the ambient LED accent is made of many independent LIN segments or centraly connected to one LIN module.
My first guess is there may be a short the control circuit is protecting itself against or the module needs some quick soldering to refresh junctions.
- Paperwork study :
I would get the schematic applicable to your car and trace things out around the light control module.
- Hands-on style:
You're going to need to dis-join all the light strips to figure what gives.
Trims are somewhat easy to remove and reuse without any broken plastics.
+++++ LIN Strings:
it would be interesting to figure if the ambient LED accent is made of many independent LIN segments or centraly connected to one LIN module.
Last edited by CaliBenzDriver; 11-07-2021 at 03:45 PM. Reason: LIN
11-08-2021, 11:19 AM
#4
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MY'14 W212 M276 3.5NA @60kMi
INDEPENDENT strings
no one has rushed to hand you an answer, perhaps you can try to look this up yourself.
My first guess is there may be a short the control circuit is protecting itself against or the module needs some quick soldering to refresh junctions.
- Paperwork study :
I would get the schematic applicable to your car and trace things out around the light control module.
- Hands-on style:
You're going to need to dis-join all the light strips to figure what gives.
Trims are somewhat easy to remove and reuse without any broken plastics.
+++++ LIN Strings:
it would be interesting to figure if the ambient LED accent is made of many independent LIN segments or centraly connected to one LIN module.
My first guess is there may be a short the control circuit is protecting itself against or the module needs some quick soldering to refresh junctions.
- Paperwork study :
I would get the schematic applicable to your car and trace things out around the light control module.
- Hands-on style:
You're going to need to dis-join all the light strips to figure what gives.
Trims are somewhat easy to remove and reuse without any broken plastics.
+++++ LIN Strings:
it would be interesting to figure if the ambient LED accent is made of many independent LIN segments or centraly connected to one LIN module.
I traced the two lighting strips independently running straight back to the Door Control module - So each LED string *IS* indepently supplied.
(Don't overload these outputs or short circuit them to avoid surprises with DCU!)
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velryba (11-09-2021)
