Help Identify Connector Under Dash

So what I am seeing is that my car being a a/c car it should have c18 plugged to the fan switch and c41 plug is not used ? At this time c41 is plugged in and c18 is not.[/QUOTE
I don't have a/c on my car and to be honest its been a while since I looked at all the wiring under the dash. The logic that C18 should be plugged in on a a/c car makes since.