Thank you for this.
I ordered the genuine harness, as well as 6 genuine sensors and brackets. This cost me around 140$ in total, but I believe it’ll be worth it to do it once and make it perfect this time!
I plan to sand the inside of the bumper where the old glue used to be and make it as flush as possible as well as sand the hole the increase it by a bit (those extra 0.2mm).
I’ll go with your suggestion of using the pig tail route. Do you mind saying which pins to connect from the genuine harness to the Ali one? I’m really bad at reading those schematics.
I’ll post updates very soon!
EDIT:
Okay, after looking at the diagrams, it seems the connections for the
10 pin connector are like so (similar to what you posted on page 21):
Sensor Location | Pin No. |
Right Parallel | 10 |
Left Parallel | 9 |
Power | 8 |
Ground | 7 |
Left Rear | 6 |
Left Rear Center | 5 |
Right Rear Center | 4 |
Right rear | 3 |
Consdiring the diagram you posted is for the 10 pin connector (which is also for license plates), then I assume pin 1/2 are for the license plate lights. My current harness has 8 pins (6 sensors + power/ground), and the new one is 10 pins.
Do you perhaps have a diagram for the 8 pin connector so I can see what to switch?
EDIT 2: Okay, I bought a 1 hour access to erWIN Online and found this:
So everything matches the table, besides pin 1/2 which are missing.
EDIT 3: Okay, some more digging... the coupling point in the boot for the license plate lights is as follows:
We can see there are two options - either a 2-pin connector (T2ca), which is what I have (and most of you guys too), or the 10-pin connector (T10la), and we can also see in the diagram below that it goes to pin 1/2 in the T10la connector:
So... mystery solved, I guess! Now I just have to find the diagram for the 8 pin connector to see which ones I'll have to replace.
My guess is that the pin numbers are just -2 for the 8-pin connector... Another route I'm thinking is possible, is to take the 2 pins from the coupling point (T2ca) and insert them into the genuine 10 pin connector. It should in theory work?
@Cuzoe WDYT about my other route? Also, are you proud of my diagnostics?