I have a 1989 240SX. The HUD is not displaying the speed in the dash or in the winshield. The odometer, trip mileage, tach, and all the dash lights work. I tested the speed sensor and it puts out 2.4 volts. I read the the voltage should be 0.5 volts. Would too much voltage be a problem and why? Do I did to replace the speed sensor? I would appreciate any help to avoid wasting time and money. Thanks, Karl

 

Fuses?

 

All the fuses check out fine. Does anyone know where the Head Up Display Control Unit is located? Karl