Rev Counter/Speedometer SIP 2.0 on a GTV 250ie

I am having a problem  with the revcounter/ spedometer, everything works but the tach- revcounter. I can't get a rpm reading , no matter where I hook up the brown wire. from the power box. Does this unit require  an ac input? Ideas?

 

  1. please connect the RPM wire to the Black/Pink wire showed in the picture, than the meter could work properly.
  2. please make the setting for the RPM at 0.5 as the attached picture. 
  3. the speedometer doesn't work properly because the customer change the setting to speed sensor, so if you get any complaint from the customer about the speed problem. Please always remind the customer to check if they make the speed signal setting as the picture I attach. à Set to “SP Int”.