Hi guys my speedo has stopped working!! Had a look today and the magnet of the back of the disk wasn't there! put another one on and still no joy... checked the feed to the sensor (3 wires) one had a 12v feed one was earth and the other had a 5v feed.. when the magnet went past the sensor the 5v feed went?? is this how it is?? or does it need calibration

Any help appreciated thanks

This is now mine and still has the same problem, can anyone answer this?

Daz.