Wire connector

This appears to be the right connector.

http://www.clipsandfasteners.com/Electrical_Terminal_14_12_Gauge_1_4_Female_p/a15504.htm

There is definitely some corrosion on the connector and housing is good enough. I tried to clean the connector but still not getting a good connection. I am also beginning to wonder if it is the connector. Maybe time for some more investigation.