Every since I have owned my truck, the intermittent function on the wipers hasn't worked.

Low is fine, turbo mode is fine, washer button is fine.

Sometimes if I accidentally leave it on intermittent, it will start to wipe intermittently after driving for about a half hour or so.

I'm hoping it is just a little relay somewhere that is easy to fix, and I dont have to take the steering column apart???

 

Chapter 17 of the FSM covers all wiper functions and how to test it. Starts on page 17-19.