Abstract: Universal telephone test apparatus is shown according to the preferred embodiment of the present invention as including first and second test jig apparatuses. The test jig apparatuses include in their most preferred form three light emitting diodes (LED's) for each pair of wires of a multiple wire pair cable. The test jig apparatuses may be electrically connected to the telephone electrical connection blocks allowing simultaneous diagnosis of all possible electrical connection conditions of each of the wire pairs of the cable. Additionally, the test jig apparatus may be electrically connected to telephone base cords by auxiliary jacks for simultaneous diagnosis of all possible electrical connection conditions of each of the wire pairs of the base cords. Further, auxiliary jacks are further provided for receiving individual wires for contact to selected pin sets for continuity and tone testing the wire pair.