With the ignition switch turned to "OFF", check for continuity of the Pink/green wire between the speed sensor 3P connector and speedometer 6P connector.
There should be continuity.
If there is no continuity, replace and repair the wire harness.
Connect the vehicle speed sensor 3P connector.
Measure the voltage at the speedometer 6P connector with the ignition switch turned to "ON" while slowly turning the rear wheel by hand.
Connection: Pink/green (+) - Green/black (-).
Standard: Repeat 0 to 5 V.
If the measurement is out of specification, inspect for an open circuit in the wire harness.