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Alternator connection is bad

It sounds like either your alternator terminal, or the lug on the wire which attaches to your alternator, is physically corroded. Been there done that - rust will not conduct electricity no matter how ...
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Working Speedometer shows a speed below 0

So. It turns out to be a much simpler problem than I thought. As per @MJH's answer above, I checked the cruise control and that worked at 30kph (15kph on the speedo). So it wasn't a faulty VSS. ...
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Working Speedometer shows a speed below 0

The numbers cited look suspiciously like the indicator has changed to giving numerical values in miles per hour instead of km per hour. Look into where you might reset that. Look also into what ...
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Working Speedometer shows a speed below 0

The Vehicle Speed Sensor (VSS) is managed by your ECU. The speedometer drive circuit receives pulses from the VSS and the pulse rate increases as the car accelerates which then displays on your ...
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