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Retrofit ambient lighting for Pano sunroof

Fraysa

Go Kart Champion
Location
Israel
Car(s)
2016 MK7 1.4TSI
Looking good.
Seems like you have the door ambient light. Is it factory or did you retrofit it?
 

Fraysa

Go Kart Champion
Location
Israel
Car(s)
2016 MK7 1.4TSI
Interesting. I’d like to also retrofit this some day but I don’t know the part numbers or how much labor it requires.

anyways, I contacted two of the AliExpress vendors for wiring diagrams for the sunroof connection. Maybe this will give us a hint.

I also contacted ZERO815 which might have some info regarding this.
 

Reaper1

Go Kart Newbie
Location
.
Found a wiring diagram, look like it connects to the can bus.

VW calls these two LED strips L235 and L236, look them up on Elsawin.
 

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ericek565

Ready to race!
Location
Slovakia
Car(s)
Mk 7 Variant 2.0
Thanks for the diagram.

If only i have a Testing donor car :D
I think the Ambient Light will work best with MIB2 and MIB2.5
The connection looks simple.
 

golfbuddy3

New member
Location
UK
Car(s)
MK7.5 GTI
Found a wiring diagram, look like it connects to the can bus.

VW calls these two LED strips L235 and L236, look them up on Elsawin.
Thanks for the diagram.

If only i have a Testing donor car :D
I think the Ambient Light will work best with MIB2 and MIB2.5
The connection looks simple.

can explain connection to me?
how do you even read those wiring diagrams? can hlep?
 

Reaper1

Go Kart Newbie
Location
.
can explain connection to me?
how do you even read those wiring diagrams? can hlep?

Two of the wires go to Power and ground, as it has to have power and ground to light up, the third one from what i saw connects to the can bus and is used to control the lights, pretty sure if its connected to the can bus then it controls the color and brightness.
 

Fraysa

Go Kart Champion
Location
Israel
Car(s)
2016 MK7 1.4TSI
Two of the wires go to Power and ground, as it has to have power and ground to light up, the third one from what i saw connects to the can bus and is used to control the lights, pretty sure if its connected to the can bus then it controls the color and brightness.

How do you see which one goes to the BCM?
 

Reaper1

Go Kart Newbie
Location
.
How do you see which one goes to the BCM?
well, one is power and you can see that B552 means - Positive connection 2 in roof wiring harness, the brown is for ground so the third has to go to the BCM.

Just had another look at the wiring diagram and the third wire goes to pin 29 On Socket B on the BCM, ( it didnt make sense that only one wire connects to the can bus so I had to double check )
 

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Fraysa

Go Kart Champion
Location
Israel
Car(s)
2016 MK7 1.4TSI
So, to my understanding:
Pin 1 -> Pin 4 of B552 (roof wiring harness)
Pin 2 -> Pin 29 of T73B (Socket B of BCM0
Pin 4 -> Ground?
 

Reaper1

Go Kart Newbie
Location
.
So, to my understanding:
Pin 1 -> Pin 4 of B552 (roof wiring harness)
Pin 2 -> Pin 29 of T73B (Socket B of BCM0
Pin 4 -> Ground?

All correct ,If you can guys have a sunroof check If this wiring matches your car.

Now remember that this diagram is from a Tiguan, It Is not factory on a golf from what I Know, so The wiring might be different In the golf.
 

Fraysa

Go Kart Champion
Location
Israel
Car(s)
2016 MK7 1.4TSI
All correct ,If you can guys have a sunroof check If this wiring matches your car.

Now remember that this diagram is from a Tiguan, It Is not factory on a golf from what I Know, so The wiring might be different In the golf.

Is there a way to test if Pin 29 on Socket B does something when you move the slider on the MMI?

will the voltage change? It’s the best way to check itI think.
 

Reaper1

Go Kart Newbie
Location
.
Is there a way to test if Pin 29 on Socket B does something when you move the slider on the MMI?

will the voltage change? It’s the best way to check itI think.

First, check if this pin Exists, It might not even be there.

In the wiring diagram it says LIN, Im not really sure what it does but the rain sensor uses it, some kind of protocol, The lights change color so it cannot be just changing the voltage. its a bit more complicated xD.
 

ericek565

Ready to race!
Location
Slovakia
Car(s)
Mk 7 Variant 2.0
The main thing i saw was that if you open VCDS on Tiguan there is a option in the LONG CODING to check box with Roof Ambient Lighting. And when i open my BCM long codding there is no such option. Only adaptiation on the Infotaiment screen.
 
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