As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PARKING BRAKE LIGHT CAUTION ILLUMINATED DURING TAXI, RESET AND ILLUMINATED AGAIN AT TAKEOFF ROLL. ABORTED TAKEOFF AND RETURNED TO THE GATE. FOUND PARK BRAKE CAUTION LIGHT TO BE INTERMITTENT DURING PARK BRAKE HANDLE MOVEMENT. R & R PARK BRAKE CONTROL QUADRANT, REF AMM TASKS 32-44-21-000-801 AND 32-44-21-400-801. OPS CHECK GOOD. CAUTION LIGHT NO LONGER ILLUMINATES WITH PARK BRAKE HANDLE IN THE OFF POSITION. RETURNED TO SERVICE.