Re: speed odometer
On Sun, 30 Oct 2005 02:01:23 GMT, James Sweet <email@example.com>
>(Just) Allan wrote:
>> On Sun, 30 Oct 2005 00:10:15 +0000 (UTC), "Peter K L Milnes"
>> <Peter.K.L.Milnes@btinternet.com> wrote:
>>>>92 volvo 740 non turbo speed odometer jumps around like 70 when you only
>>>Surely you mean that the speedo needle is unstable. Check for poor
>>>connections from the sender and/or poor sender (on rear cover of
>>>differential [final drive]). also check connections on rear of instrument
>>>panel. Odometer tells you how far the car has moved.
>> I had a mechanical speedo that jumped all over the place too. I think
>> it must've been a mechanical fault in that case at least, because
>> adjusting the path of the cable inside the dash slightly would vary
>> how much the needle jumped around. In the end the car rusted out, so
>> I never did find out why it was happening.
>A mechanical speedo that jumps is either a dried or kinked cable, or
>rubbing of the magnet inside the speedo. In this case though the speedo
>is electronic, usually the cause of jumping is either the wiring rotting
>out back by the sensor under the car or bad solder connections on the
>circuit board in the speedo.
Heh - I suspected the dry option at the time - put in some oil - and
it jumped even more. : o