Could someone identify this connector?

[1986f250]

What is connector C327 for?  
It's shown in diagrams on these pages, but it doesn't show it connected to anything or say what it is.

122 Figure 2 in   http://www.garysgaragemahal.com/tailgate-power-window--defrost.html
66, Figure 3, & 69 in  http://www.garysgaragemahal.com/headlamps.html

[Gary Lewis]

It shows in the upper left corner of Page 53: http://www.garysgaragemahal.com/carburetor-circuits.html.  But it shows in the listing on Page 54 as having three terminals, so probably shows up on other pages as well.