Front ABS Sensor Wiring Colors?

According to my wiring diagram, for the front right Pink is POS and Blue is NEG.

Can't say what your sensor is for sure, but for the rear sensors white is POS and black is NEG, so that'd be my guess.

 

The white and black for the front sensors aren't shown in the wiring diagram, because that pigtail is just considered part of the sensor, and the first connector shown in the diagram is the one (A34) where that connects to the blue (−) and pink (+) wires from the ECU.

You could assume the undocumented black/white wiring of the sensor itself has the same polarity as the rear sensors (where it's documented) ... but that would definitely be an assumption.

I've never checked whether the left and right front sensor are the same part number. The connectors do look like the same shape in the wiring diagram. If the sensors are the same, you could go look on the other side, where − would be whatever connects to the green wire, and + to the red one.

 

I believe in this generation they are powered Hall sensors.

 

So + from the ECU would have power, and - would be signal wire and closest to ground?

 

Well, it's only a two-wire circuit, so whatever current is flowing must flow through both, and the ECU could read the 'signal' off either one. That's a detail not shown in the wiring diagram or repair manual, and probably not necessary to know.

The diagram does already show the polarity of the blue (−) and pink (+) wires from the ECU. A meter could confirm if you want to be sure that's right. But I'm not sure that helps you if what you need is the polarity of the black/white wires of your sensor's broken-off pigtail.

Have you checked whether the left and right sensors are the same part number?