A terminal testing device provides an adapter customized to a port of a connector being tested so that force applied to the adapter identifies loose and fixed terminals in the connector. The adapter includes springs and push pins that correspond in number to the number of terminals being tested and has a face plate that corresponds to the type of connector being tested. The push pins provide force against the terminal end. Specifically, the device seats the adapter and connector to align both and permit force to be in line with terminal ends. The force applied to the terminal ends is uniform and controlled by means of the adapter and is obtained by a single driving means.