This is actually for steering wheel mounted auto trans shifter
buttons.  When checking with a multimeter, the "Up" button on
the steering wheel gives me a resistance of 0.3 ohms, while the
"Down" button gives me a resistance of 2.0 ohms. But if I wire
the Joycon EXR to those exact same wires that I'm testing, both
buttons give the same result in Joycon Explorer, the red
indicator leaps to the far left for either button.  What am I
doing wrong?