I have a rare base model Frontier... I guess they had to sell a few so that the XE package could legally be called an upgrade. Anyhow, my truck came without intermittent wipers. I did some research looking at the FSMs and found that Nissan changed the wiper switch in 2002 to one that integrated the wiper amplifier (delay circuit) into the stalk switch base. So I was able to buy a switch set out of an '03 Xterra from a junk yard I found on
http://www.car-part.com for $40 shipped. The swap was literally a 10 minute plug-n-play process! I also got the light stalk with the fog lamp switch that I'll install later when I buy some fogs to add.
Just thought I would share this in case anyone else has a base truck with the cheap-o wiper setup and wants to upgrade.
Note - pre 2002 Frontiers appear to have a separate wiper amplifier - which would make this upgrade a little more complicated.
Heath