First of all, I checked Rassy's suggestion regarding the red light. It does not light up. So I un-taped the place on the sensor cable where I had repaired the crimping explained in my first post. I put 12 volts DC across the red and white wires and the red light lit up. Note the light only shines when positive is hooked to the white wire and negative to the red. Reversing this produces no light. Also, no connection combination with the black produced light.
Regarding my strange 64 DC volt reading: I was unable to secure a different voltmeter. But I triple checked to make sure my voltmeter works. It does, I but discovered upon closer inspection that the reading is 64 millivolts. I had not seen the tiny m on the display. In other words, the controller is not sending sufficient voltage to the sensor.
Does this mean my controller has a problem? Please recall that the bike functions perfectly fine...I have throttle control and three levels of PAS. It is just that the error code 21 appears and the speedometer/odometer does not read.
If anyone out there can, it would be much appreciated if you could post the voltages of the red, white and black wires on a working unit. On my unit when you unplug the cable from the sensor and look at the cable's female plug end with the flat portion down, the white is on the right, the black is on the left and the red is centered on top.
Also, it would be helpful if someone could explain in terms that are not too technical how the three wire sensor works with the C965 display. Is it something as simple as one wire carries voltage for the light, one functions as the ground and the third carries on and off continuity through a reed switch? Or is this the hall type which I don't really understand?