Hi everyone,
I recently installed a Leoni 10R00-10R04-12085 01 wiring harness on my 2021 Seat Leon KL1 and it was a real pain to figure out. The manufacturer documentation is hard to read and the wire color mapping between the vehicle and the Leoni control box is nowhere to be found in a clear format.
After hours of research and no answers from the seller, I put together a wiring guide with full wire-to-wire correspondence (vehicle side vs. Leoni box side), MX3 connector pin assignments, and the relevant pages from the official wiring diagrams.
Hopefully this saves someone else the headache. PDF attached — feel free to use and share.
I recently installed a Leoni 10R00-10R04-12085 01 wiring harness on my 2021 Seat Leon KL1 and it was a real pain to figure out. The manufacturer documentation is hard to read and the wire color mapping between the vehicle and the Leoni control box is nowhere to be found in a clear format.
After hours of research and no answers from the seller, I put together a wiring guide with full wire-to-wire correspondence (vehicle side vs. Leoni box side), MX3 connector pin assignments, and the relevant pages from the official wiring diagrams.
Hopefully this saves someone else the headache. PDF attached — feel free to use and share.
