vss input power?

Just getting back to this project after many issues here with illnesses in the family so I have forgotten a couple things and thought I would ask. I am putting a early 2000's t56 in a scamp and have found out the all in one Bowler harness will not work on the pre 2007 or so trans. I have a 3 wire vss and do not remember input voltage to it, thinking 5v but ??? need the sensor in order to wire the reverse lockout so I do not need to wire a switch. Any help would be great....Thanks,Bruce