Talk Morgan Forums Thread Like Summary - '15 M3W heated seats switch wiring

Have had the interior of my '15 M3W out for cleaning, upgrades, etc. Now putting it all back together... and I cannot find the photo I took of the heated seats switch wiring. There are three spade type connectors on each switch. There are two sets of three colored wires with connectors. Does anyone know the color order of reconnecting the switches? I have gone through the Parts Book, but not found anything useful. Any help appreciated.

I think it's likely the switches are two position single pole changeover being used as on/off so a third pin redundant. A multimeter set to continuity will confirm. I can only repeat the black and green wires you have correctly identified should provide a shared ground feed (black) to one leg of each seat pad with the other connected to it's own switch. A further shared feed from the green wire should run as power to each switch.

The chassis loom schematic is just that with it's terminations to/from being shown as labelled connectors to discreet components not shown.

In theory one should always check the original (even photograph it) before dismantling - but the factory install of the heat seats - at least in my 2015 - involved copious duct tape meaning the cables had to be pulled BEFORE getting good access to the switches (unless you are cleverer than me and disconnect the feed and earth from under the dash 1st, and leave the switches in situ making sure the feeds for the seats come out with the gearbox cover). Probably could have been photographed if up on a lift!
I used a multimeter to try and ascertain the poles on the switches - and still got it wrong on reassembly. Not suffering from a cold bum I don't miss them but my occasional passenger likes them so at some point over the summer will have to do some dissasemby, reassembly, and fuse changing...