Hi Tim & Tom,
I have not tried on a Ford Focus but there are 2 other methods if you do not have a K110 probe.
1. On many of these magnetoresistive sensors you can see the switching waveform by measuring between 0V (chasiis ground) and one side of the sensor. You will see what looks live a DC voltage (different values on different vehicles) but if you zoom in on the signal you will see a square wave of a few mV when you spin the wheel. Try this on a known working sensor first.
2. The signal usually switches from 5mA to 15mA which is a bit small for the 20A/60A probe (although with the resolution enhance to 16 bits its just about visible). If however you can pass / wrap a wire carrying the signal through the jaws of the current clamp 10 times then the current clamp sees 50mA switching to 150mA which is more than enough. I have done this using the 6 way break out leads before, but the best method depends on where the connector is.
I hope one of these helps.