so i fitted my TC switch some problems but it all sorted itself out ..as i followed the TC guide off this site just thought i would add some of the different ways it can be done
1. as for the wire in that goes in to the abs plug there's a pink plastic insert that holds the wires in place i found it easier to push this out enabling easy insertion of the new wire and plug.
2.as for the wiring loom that comes in the kit (part number in the how to pdf) there is only 1 wire needed to go in to the engine bay the other to can be picked up inside the car..
3. i remover all the wires from the blue plug on the loom then run the one brown/white wire to behind the ashtray as for the other wires my car has no heated seats but it has the plugs for them hence the other two wires
4.on the heated seat plug there is a small yellow plastic insert that can be removed with a screw driver this enables you to remove the wire pins the tow wires you need are the brown-earth and grey/yellow-switch illumination see how Ive moved the two wires from the green plug to the blue plug and this has worked for me..