Abstract: A connector position assurance (CPA) element and lock arm structure for mating connector housings in which the CPA element has three-stage insertion and two-stage withdrawal with complementary locking and release-preventing engagement with the lock arm and connector housing in each of the positions. The CPA element is first inserted partway underneath the lock arm on the first housing to a pre-set position in which it is not easily removed from the housing. The connector with the pre-set CPA element is next inserted into a second connector housing, in which the CPA element is released from the pre-set position to a pre-locked position. The CPA element can then be fully inserted underneath the lock arm from the pre-locked position to a fully-locked position in which it provides both a visual indication of complete connector mating and strengthens the locking engagement between the connector housings.

Abstract: An electrical connector for wiring harnesses and other electrical devices has a latch to hold the connector in engagement with a mating connector and side and top guards to guard against inadvertent release of the latch. The guards also serve to prevent wires or other foreign objects from becoming entangled with the latch during shipping and handling.