AMP Econoseal J Mark II series connectors have been developed for use in automobile engine compartments and other applications where waterproof protection and rugged construction are required for electric connections. Waterproof protection with these connectors is achieved by means of a wire seal which is inserted on the wire and crimped in the insulation support of the contact simultaneously with contact crimping. Mark II Connectors have a plate inserted in its housing to detect half-mating of contacts increase their retention provide a double tab-lock function and prevent damage of contacts at mating/unmating.