Brakes released, ready for pushback.

Ding! A/Skid IB A/Skid OB Caution Message.

Parking Brake ON (Cautions extinguish)
Parking Brake OFF (Cautions re-illuminate)

Simply Release parking brake, feet off brakes, then reach up an flip the A/Skid TEST switch quickly one time. Viola!

Works Good. Lasts Long Time.