Wiper relay
 

I am still trying to find the exact location of the intermittent wiper relay on a 1980 300SD.I have looked in the fuse box,under the dash on the drivers side and under the hood to no avail.Begining to think this is a legendary animal like Big Foot or the Loch Ness monster.Any help would be greatly appreciated as I live in Oregon and this rainy season is really testing my patience with the wipers.Thanks :)