Service vehical soon anti lock and trac off comes

The computer system reset every time you turn key off. The system then does a 3 second bulb check to verify all is functioning correctly. If all is well stays off. The reason why it only turns on when moving is because the abs sensors are either not picking up any vehicle speed from one of the wheels or there is a faulty connection in wiring at one of the wheels. Need to have vehicle scanned by a good shop and verify which wheel is causing the problem. If light is on ABS and traction control systems are disabled.