Check Break Linings dashboards warning.

[JCL]

Originally Posted by JCL

If visual inspection shows there is lots of pad left, then a light on is due to a bad connection on the sensor wire, or a damaged sensor.

Same answer. Sounds like the sensors haven't been replaced recently. Perhaps they were reused last time and are old and hard, or maybe they weren't connected properly. It is either a bad sensor or a bad connection. Every time the wire doesn't make contact the light on the dash comes on. When it makes contact again, the light goes off soon after. There is nothing to reset, it just depends on continuous contact.

Your indy should be checking the wiring, and if nothing is found and because it is probably cheaper to do so than keep investigating, just replace the sensors.