1990 TC wiper park problem

After a rain storm the other day, the wipers on my 1990 TC now park in the vertical position, instead of below the hood line. They returned to normal one time since, but today started parking upriaght again...

Anyone have any suggestions as to cause and fix?

Thanks

Jo Shamble

..They returned to normal one time since, but today started parking upriaght again...


Here's a few related posts:
http://www.lincolnsonline.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=004864
http://www.lincolnsonline.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=004814
http://www.lincolnsonline.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=004352

And there's a tech article about this as well, but I can't get to that section of lol at the moment:
http://www.lincolnsonline.com/tech.html