I have a 250 Raid model with digital speedo.Was working fine, it still lights up but does not now register any KM/h, it just reads zero. I have read through forum which has been a great help.At the sensor near front sprocket I am getting 5v on blue wire and about 4.7v on yellow wire.When I spin the wheel to turn sprocket (with the magnet wheel spinning) I dont get any change in voltage, I.e no pulsing. Any help as to wether it's the sensor or the magnetic wheel would be appreciated.The wheel doesn't look damaged but the material in the middle looks patchy, but not sure if it supposed to look like that? I did notice a few drops of water inside the sensor housing and the screw that holds it in place looks corroded so there's definitely been water or moisture in there.
