My ABS warning light came on a few weeks ago, and consequently my brake lights don't work regularly anymore. The rear lights all work, including the reverse indicators. Any suggestions?

Welcome to the AF!

I think you can get the system diagnosed at a dealer with a special monitoring tool. They can tell you if you have a defective component in the ABS.

A common problem is having a loose connection at the wheel sensors. Make sure all the sensor connections are tight.