As far as i can see the index and timing sensor are wired thus .
Pin 1 is Green 10v
Pin2 is Blue sensor output x1
Pin3 is Red sensor output x Many
Pin4 is Yellow 0v com

This was based on pics on your other boxford thread , the pins/ use data is from the boxford manual
The pics i used are below

Click image for larger version.  Name: TCL index timing pinout from boxford manual.jpg  Views: 2517  Size: 38.3 KB  ID: 29089



Click image for larger version.  Name: TCL index timing colours for pin.jpg  Views: 2551  Size: 32.6 KB  ID: 29090

Regards
Inee