An electrical connector sub-assembly comprising: a housing comprising electrical contact receiving areas, configured to receive electrical contacts and at least one deflectable latch arm configured to latch at least one of the electrical contacts in a respective one of the electrical contact receiving areas; and a terminal position assurance member comprising a main part, a first part configured to block deflection of the at least one deflectable latch arm and a second part separate from the first part configured to block removal of the at least one of the electrical contacts, the first part being attached to the main part and the second part being a separate member from the main part, characterized in that the main part and the second part are movable relative to each other, wherein the second part is adapted to pivot relative to the housing when the main part is moved from an unlocked position towards a locked position, wherein the main part and the second part comprise a cam engagement adapted to cam the second part when the main part is moved from the unlocked position towards the locked position, wherein the cam engagement comprises a portion of the second part being located in a camming slot at a front end of the main part, whereby the second part forms a secondary terminal locking member comprising front end projections which are located in the camming slot, wherein the second part comprises terminal latch surfaces, whereby when the TPA member is in the unlocked position, the front end projections are located in bottom portions of the camming slots, and the terminal latch surfaces are configured to be spaced from a latch surface of the electrical contacts, whereby the camming slots comprise a cam surface and a top portion with a ledge at the opposite end from the bottom portion, whereby when the TPA member is moved to the locked position the cam surface causes the front end projections to cam upward in the camming slots and the terminal latch surfaces are configured to move behind the latch surfaces of the electrical contacts. a housing comprising electrical contact receiving areas, configured to receive electrical contacts and at least one deflectable latch arm configured to latch at least one of the electrical contacts in a respective one of the electrical contact receiving areas; and a terminal position assurance member comprising a main part, a first part configured to block deflection of the at least one deflectable latch arm and a second part separate from the first part configured to block removal of the at least one of the electrical contacts, the first part being attached to the main part and the second part being a separate member from the main part, characterized in that the main part and the second part are movable relative to each other, wherein the second part is adapted to pivot relative to the housing when the main part is moved from an unlocked position towards a locked position, wherein the main part and the second part comprise a cam engagement adapted to cam the second part when the main part is moved from the unlocked position towards the locked position, wherein the cam engagement comprises a portion of the second part being located in a camming slot at a front end of the main part, whereby the second part forms a secondary terminal locking member comprising front end projections which are located in the camming slot, wherein the second part comprises terminal latch surfaces, whereby when the TPA member is in the unlocked position, the front end projections are located in bottom portions of the camming slots, and the terminal latch surfaces are configured to be spaced from a latch surface of the electrical contacts, whereby the camming slots comprise a cam surface and a top portion with a ledge at the opposite end from the bottom portion, whereby when the TPA member is moved to the locked position the cam surface causes the front end projections to cam upward in the camming slots and the terminal latch surfaces are configured to move behind the latch surfaces of the electrical contacts.