Some infra red is visible ,I take it the sensor isn't, thank you for replying.It's infrared (IR). You can see it with a camera.
You were right about that sensor,I decided to check the display as I noticed it came off ,the contacts were corroded ,cleaned them and tested the the wheel sensor by turning the wheel ,it worked.Some infra red is visible ,I take it the sensor isn't, thank you for replying.