Method of inserting connection terminals into half-fitting prevention connector

A inserting method of connection terminals into a half-fitting prevention connector including a first connector housing having a flexible lock arm, a second connector housing having an engaging portion for engaging a lock portion of the lock arm and adapted to be connected to the first connector housing by engagement between the lock portion and the engaging portion at the time of fitting with the first connector housing, and a fitting detection member attached over the first connector housing slidably along fitting direction of the connector housings so as to detect a half-fitted state of the connector housings according to whether or not the fitting detection member is able to slidingly move from a first position before fitting of the first and second connector housings to a second position after the fitting of the first and second connector housings, the inserting method comprising the steps of:

• moving the fitting detection member to a position where a rear end of the fitting detection member substantially coincides with a rear end surface of the first connector housing or a position where the rear end of the fitting detection member is located forwardly of the rear end surface of the first connector housing;
• inserting the connection terminals into the first connector housing;
• moving the fitting detection member to the first position where the rear end of the fitting detection member projects rearwardly of the rear end surface of the first connector housing;
• and
• effecting an operation of engaging the connector housings.