Troubleshooting Anti-Lock Brakes
Over the river and through the woods was more dangerous back when cars had crummy bias-ply tires, rear-wheel drive and ordinary brakes.
ABS has become pretty much standard equipment on most vehicles
This process repeats many times per second until the vehicle stops or you lift your foot off the brake pedal. The ABS computer does a power-on self test every time you cycle the ignition.