Wiper door limit switch

[anchors]

The connector to one side of the wiper door limit switch broke off on my 71 and needs to be replaced. The door is vacume operated which is readily visible when open. Before I replace it can someone explain its purpose. Thanks in advance!

 

[6880 Mike]

Wiper door opens by vacuum. When open far enough to clear the wiper arms, the plunger trips the wiper limit switch and turns on the wipers. Wipers are electrical after the door is out of the way.