Bill Ingo's color description is right on for my 93 964 wire harness at the motor:
The 74 14 pin connector is different as shown by Ingo:
My 78 reads as follows:
1. Yellow
2. Green
3. Blue
4. Green/Red
5. Green/White
6. Grey Brown
7. Blue/Yellow
8. Brown/White
9. Green/Yellow
10. Red/White
11. Blue
12. Black/Violet
13. Yellow/Black
14. Red
The differences between the 964 (at motor) and 78SC (at chasis) are as follows:
2. SC=Green, 964 empty
3. SC = Blue, 964 = Yellow/Black
5. SC = Green/White, 964= Green Yellow
7. SC= Blue/Yellow, 964 = Blue Green
8. SC=Brown/White, 964=Brown/Blue
9. SC=Green/Yellow, 964 = Green/White
10. SC=Red/WHite, 964 = Red
13. SC=Yellow/Black, 964=Yellow Green
14. SC=Red, 964=empty
If anyone knows what the corresponding colors are that would be great. Once I figure it out I'll see if Ingo will do a graph.