Insizwa

Posting this because I couldn't find either of these anywhere when I needed them — hopefully saves someone else the legwork. 1. Genuine wire-colour reference (confirmed on a 2016 Superb Mk3, liftback, LHD) This is the actual colour-to-pin mapping from a genuine Škoda pre-wired 13-pin harness, confirmed by physical function testing on the car: Pin Wire colour Function 1 Black/white Left indicator 2 Grey/white Rear fog light 3 Brown Ground (return 1–8) 4 Black/green Right indicator 5 Grey/blue Right tail/marker 6 Black/red Brake/stop light 7 Purple/black Left tail/marker 8 Blue/black Reverse light 9 Red/yellow Permanent +12V 10 Black Switched +12V 11 Brown Ground (pin 10) 12 — Vacant (CAN/trailer detection, unused) 13 Brown Ground (pin 9) Worth flagging: genuine wire colours are not standardised across different towbar kit brands or even Škoda model years — this is specific to this harness/car, not a universal chart. If it doesn't match yours exactly, that's expected, not a fault. 2. Trailer module coding fix — wrong-side indicators + missing tail light + brake triggering indicator Fitted a brand-new genuine trailer control module (5H0 907 383C, Hella, dataset EV_TrailFunctGener3Hella) with the harness above. On first test: only one tail light worked, indicators worked but on the wrong side, and the brake circuit triggered indicator-like behaviour. Fix: OBDeleven → Control Units → 69 Trailer Control → Long coding. The module shipped with byte 0 = 02. Changed to byte 0 = 01, saved, power-cycled ignition. All three symptoms resolved. Full working coding string: 01 00 00 02 02 00 14 00 (02 appears to correspond to a non-EU/NA-pattern regional default on a factory-fresh module; 01 is correct for this EU-spec car. No forum post I found had byte 0 confirmed for this exact symptom set — posting it now so it's out there.) Happy to answer questions if this helps anyone in the same spot.