Wiper cont
Pic 1, In the last group of pics was a pic of the right side wiper post. That picture would have been with the wipers in the parked position. This pic is the same post, but is at the end of the travel in full stroke position. Notice the amount of movement of the arm at the linkage end.
Pic 2. This is the infamous idler arm, well at least the bottom 3/4 of it. The top, that you can't see (unless you take it apart) has the same distance from he center bolt to the linkage bolt as the bottom (that you can see). That center bolt is a 1/2" bolt, and the idler has a sealed bearing with a 1/2" id hole. The arms for the linkage are both welded to the bearing retainer, 180 degrees apart. The rusty link you see is from the motor, The bolt holding it passes through the a hole in the arm and the linkage from the right side wiper post connects to the back of that bolt. The linkage for the driver side wiper post is attached to the arm at the top of the idler. With the linkage in this position, the wiper is at the end of the full stroke. The part you see behind the idler is the cowl vent door. The lever you see under the motor linkage is what opens and closes the cowl door. There is a better view of it in the next pic. The vertical bar towards the right of the idler is the bracing between the cowl and the dash lower support, the stud with the red paint around it is the farthest left glove box mounting bolt.
Pic 3, This is the same exact view as the last pic, the difference is the linkage is now in the wiper park position. On the top left of the idler you can see just the lower end of the arm for the driver side wiper linkage. You can also now see the arm that is bolted to the cowl vent door that is used to open and close the door. The door is currently closed, to open it, the bottom of that lever moves toward the firewall (away from you). The linkage coming at you is connected to the actuator that opens and closed the door.
Pic 4, This is a little better view of the forward linkage that opens & closes the cowl door. It also gives you a better view of the lower end of the door lever. Notice the adjustment bolt to adjust the tension on the closed door? This is necessary to assure the door is closed to keep the seal water tight. There is a water drain channel around the vent door seal, but it has limited capacity.