Quick read through.. they are reading from the front wheels, which wouldn't be ideal for our situation.. but seems along those lines just wire in a lead to share the rear wheel signal and run from it to the front signals leads where it plugs in at the fender well? Just tape it to the car since your not "running down the highway.."
Also seems like an ideal way to isolate that "ABS" error..just swap it around till all reads good and you've isolated your dead sensor..