Vespa GTV250ie Speedometer stopped working

If the speedometer stops working the odometer stops also. Sounds like it is stuck in first gear. The RPM went up because the throttle was response to pedal but transmission not response. Check transmission fluid color. Whip off dipstick on a white paper towel look for gray if see any that is metal shavings and transmission is bad.

If the speedo and odometer are both dead, you should have shifting problems and a check engine light. The speed sensor in the transmission has probably died.
If the speedo does not work but the odometer does, chances are the problem is in the speedometer head.

CONNECTION WIRES RELAY FUSES OR JUST REPLACE SPEEDO CLUSTER

they cannot be adjusted....

Because the inner cable has to turn and flex as it spins, they can occasionally break, this can be normal wear and tear. other reasons can be rust from washing, incorrect installation when changing tyres, or the outer has been kinked or damaged. Repace inner and outer as a set, apply some light lubrication.

My nephew has a 96 taurus also when his radio went out he noticed that his speedometer was not working as well so we check the fuses under the dashboard and found that a fuse from the radio memory was blown . We replaced it and the radio and speedometer and the odometer worked fine

- the speedometer-cable is broken -that happens after some years all of a sudden
- the problem is: it is not easy to fix because you need to remove the instrument panel to get to the upper connector of the new cable going to the speedometer and to replace the complete cable

have the dsme problem. need to chech each of the 3 wires for continuity between the v.s.s. and the e.c.m. if good then the speedo is bad.

My guess is that the speed sensor has gone out or the wires that go to it have been knocked off somehow.