plug side of TR switch. From top left to bottom right (#1-7), per Bentley 97-120 wiring diagram:
1. <null>, but has continuity with #2
2. Brown - ground
3. purple(lilac)/black - to T68/40, 68 pin connector on TCM
4. red/yellow - to T10/8 10 pin connector then to TCM
5. blue/yellow - to T10/6
6...