Hud cluster just reads zero

[Greybush]

So I just replaced my cluster with a working hud. I have not had a working speedo in this car since I bought the car. I didn't know if this was a speed sensor problem or possibly something else. I know when I just tested the speed sensor it's base reading was 2.58 volts then would jump from 70-99 volts when bring turned. Could that be my culprit?
I have a DOHC

[Greybush]

anything? would just like to know before i drop the cash on a new one