Heated leather front seats wiring loom diagram? Passenger seat. Now a few part numbers for spare part search: 1J0 963 555 B seat heater 1J0 963 557 C backrest heater 1J0 963 563 B 01C switch / control unit heated seats---Instruction for additional wiring harness mirror memory 10-pin connector brown below the driver's seat Pin 2 - yellow Pin 3 - white Pin 4 - Red Pin 5 - Brown Pin 6 - Green Audi A4 No. 2/1 Wiring diagram - VAG Links PDF fileWiring diagram ws= white sw = black ro = red br = brown gn = green bl = blue gr = grey li = lilac ge = yellow Ground connections or = orange rs = pink Audi A4 No. 2/4 T10c - 10-Pin Connector, violet, connector station A-pillar, left 32 - Ground connection, behind instrument panel, left 43 - Ground connection (lower right A-pillar) Wiring harness help. | Audi-Sport Hi, I collect some S4 heated seats, full electric on Thursday and was looking at getting the rest of the bits I need. Where is the best place to get a retrofit wiring harness from?