Electrical connector position assurance system

A connector position assurance system for an electrical connector adapted to mate with another mateable connecting device, comprising:

• said connector including a housing;
• a primary locking arm on the housing for movement between a first position when the connector is fully mated with the mateable connecting device and a second position of incomplete mating of the connector with the device, the primary locking arm including a latch for mechanically interlocking with a cooperating latch of the mateable connecting device;
• a locking slider mounted on the connector and being slidable between a first position allowing movement of said locking arm and mating of the connector and the device and a second position blocking movement of the locking arm away from its first position with the connector and the device fully mated;
• said primary locking arm in its second position of incomplete mating of the connector with the device blocking movement of the locking slider from its first position to its second position and thereby indicating that the connector and the device are not fully mated;
• and
• abutment means on the mateable connecting device for engaging the locking slider and moving the locking slider from its second position to its first position in response to mating of the connector with the device in the event that the locking slider inadvertently is in its second position prior to mating of the connector with the device.