Rear sequential light not fully working

[Dorse77]

Afternoon,
Having an issue with ds rear sequential indicator only half working when driving, works fine locking, hazards.

I've have spoken to company purchase from and they say
'The original halogen lights where fine with the camera wiring but LED lights draw 3 times the power of halogen then discovering a problem,
Could you please check the wiring and un plug the camera sensors or tow bar and the problem will go'

Help, I've unplugged towbar as fitted by myself. But how is best to unplugged camera and sensors?
Or is there any other way around this fault?
Cheers Andy

 

[Robert]

As I have mentioned before(somewhere else) some sequential LED strips are voltage sensitive.
For example they work perfectly with 12V DC and then they misbehave with increased voltage of 14.5V DC(when engine is running).
Luckily these strips are very rare and majority of recent/modern strips cope very well with increased voltage.

Then there is another trap .
Indicator's pulses can be PWMed(Pulse Width Modulated) and this is controlled by BCM coding.
Almost all aftermarket LED strips don't like PWM and they won't work properly, especially when engine is running.

This is how indicator pulses look like when PWM is ON and engine is running.

View attachment 68152

And this is how indicator pulses look like when PWM is OFF and engine is running.

View attachment 68153

To deactivate indicator PWM the following VCDS coding modification needs to be applied.
09 BCM, (Byte 19, bit 3) = 0 (unticked)

View attachment 68158

 

[Dorse77]

Brill thank you, understand now