Abstract: A combination brake light testing device and tire billy is provided for use with a vehicle, such as a school bus or any C.D.L. (Commercial Driver License) vehicle. The device includes an elongated tube having an elongated rod telescopically received within it so that the rod is movable between an extended and a retracted position. A compression spring is compressed between the rod and tube and resiliently urges the rod toward its extended position. The device is dimensioned so that, with one of the tube or the rod in abutment with the driver's seat and the other of the tube or the rod in abutment with the brake pedal, the brake pedal is actuated thereby allowing inspection of the brake lights. A handgrip portion is also provided around the tube adjacent one end while a tire impact member is secured at the opposite end of the tube so that the device can be used as a tire billy.