Spent three days looking for this schematic:

http://www.techlib.com/files/wiperkik.pdf

The Subaru does not have an intermittent function on the rear wiper, and
driving along at night stopping every 20-50 feet I don't want to think of
the rear wiper in the rain. So I found the schematic and started looking
for parts.

Since there isn't any electronics industry in the town I live, (um, there
isn't ANY industry, except for the Granola bakeries...) and Radio Shack
doesn't really cater to hobbyists anymore, the price for the components, a
'breadboard' to build it on, and an enclosure came up to >$18. Then spend
an hour or two building and testing, and another hour installing, and
we're talking some serious effort here.

Why not just do this:

http://www.jcwhitney.com/wcsstore/jcwhitney/images/imagecache/G_14485G_CL_1.jpg

Whopping $9.99, with $7 shipping ($17) and 10% off just because (Use those
coupon codes!) Shipped for <$16.

I'm going to open it up and move the dial off the box and mount it in the
dash, and bury the box behind the dash cause I don't like tacky-looking
"add-ons", that'll take about an hour.