UK Auto Repair Questions?
The speedometer obtains its reading by one of the following depending on vehicle model:
You should initially have a full diagnostic code read carried out to determine if there are any codes present. From there a diagnostic path can be established.
If it is a Speed Sensor this will be a 3 wire connector which should be Live, Earth and Signal.
If it is the Signal from ABS Module you would need to look at the Signal wire and determine if there is any reading by using an oscilloscope.
As above it will either be:
This will depend on what model yours is. The easiest way to tell is to look at the rear of the Transmission Assy in the area just above where the Driveshafts enter and see if there is a sensor these with a 3 wire connector to it. If there is then you have Option 1. If there is nothing there but a blanking plate then you have Option 2!
No problem at all.