Does tacho run off coil or alternator ?

[TheTraveller]

1995 T4 petrol 2 ltr. does the tacho run off coil or alternator ?. The issue I have is that the tacho has become very 'jerky' in its movement and when i turn ignition off it stays on 1000 rpm. (the dial not the motor) if i then just flick ignition on and off again the dial goes to zero !! any thoughts ?

[Syncrotek]

Powered by the electronic ignition.
That would more than likely be a sticky instrument movement at a guess.

Just to add - if it sticks again when turned off, give it a tap on the glass or around the instruments to see if it moves back to O.

[AALocksmiths]

It will be the servo motor in the cluster as these do play up and act as you described.

[TheTraveller]

Powered by the electronic ignition.
That would more than likely be a sticky instrument movement at a guess.

Just to add - if it sticks again when turned off, give it a tap on the glass or around the instruments to see if it moves back to O.

OK thanks for that, will try next time

[Umai Naa!!]

Have you tried hitting the top of the dash?

Probably won't fix it as such, but it'll maybe confirm where the problem lies.

[TheTraveller]

Thanks all, hitting the dash worked fine. Went for a long drive today and all seems to have settled.