Speedometer problem

[Wolf_Tm250]

resistance is futile

Checking resistance will however, tell you if there in an intercepter or something in the system.

We had a problem with an MR2 that after a year or so the speedo stopped,
and traced it to a speed Cut defender that the wire had come off, that the customer did not know was there.

It may have had something fitted by a previous owner that has failed,
or has just started working.

We have no speed limiter in Italy, so I think no one ever installed one of this devices!

Out of interest, on the face does it have written KMH or MPH?
Dont know what they use in Italy?

ALL metric here... and we use the correct hand (right) for changing gears...

[Wolf_Tm250]

Wolf,

Have you got access to an oscilloscope, or a multimeter with a logic counter?

If so you could compare the output of the speedo drive at the gearbox to the input at the gauge cluster. If there's no difference, and the frequency is the same as your ST205 at the same speed, then the problem must be in the gauge cluster circuit that does the digital to analog conversion.

If the frequencies are the same at the two locations, but different to your ST205 at the same speed, then the problem lies with the speed sensor or the mechanical drive to the sensor.

This is really a great idea... thanks!

Another beer for you (they must be 100/110 cans till now...) the first time i'll come in NZ!