Short story:

- Girlfriend has a 91ish Grand Cherokee 4.0l with ABS light on.

- Replaced front pads/rotors and rear shoes because of wear

- Noticed metal washer magnetically attached to rear wheel speed sensor blocking the sensor pickup wheel.

- Cleaned all sensors and removed all signs of debris.

- Disconnected battery for 30 min and reconnected.

- ABS light still on even after test drive.

How do I read ABS Codes and/or Reset ABS light?