So here's the hall sensor cable"
The white wire is probably the speed sensor line
After careful re-measurement, I'm getting:
+4.45 volts between red and black (-black probe on black)
+4.95 volts between black and the halls (green, blue, yellow) (-black probe on black, +red on halls)
+0.5 volts between red and halls (green, blue, yellow) (-black on halls, +red probe on red)
0 volts between halls (green, blue, yellow) and white (speed sensor)
Moving the wheel does not change the voltage between any of the combinations tested.
motomech wrote:The Black(- voltmeter) stays on the black and you rotate the red(+Voltameter)between the remaining three colors(grn., yel., blue).
It would be most unusual for all 3 Halls to be defective.
I agree, and I don't think the halls are defective. I'm at a loss to explain the observation, except that all three lines could be shorted with a 5V power source in the controller. The black should be 0 volts and the red should be 5V. Maybe they swapped the red and black lines in the motor connector from the controller? It's hard to tell without making my own wire harness, as the motor cable and connections are quite cryptic.
I know my way around a multimeter and have it set properly at the 20V DC setting. Getting at the wires on the controller side of the plug is ridiculously easy as the metal is easily accessible in the plastic housing. I examined the plug and I don't think it's shorted.
2012 Kona Dew Deluxe, Q128C and 9spd cassette, S12S sinewave controller, 48V Panasonic battery