the speedometer on my 7g is not working, the odometer and trip meter included. I have changed the speed sensor but still it doesn't work. any ideas? When i checked the wires connected to the speed sensor, i'm reading 12V+ between the input pins- pins 1 (black/white) and 2 (black). the output pin - 3rd pin (yellow/white), im reading around 10V between pin 2 and 3.is this normal? thanks!