OK... got a few things done on the BRAT tody (thanks, SOOBOUTLAW!).

 

One of the original problems with this thing when I got it, which caused a "fun" ride back from California in the rain, was the following wiper system malfuction:

 

When I turn the wiper switch to "INT", the blades move from rest to 2/3 of the way through the upward stroke, then stop. 5 second later, it moves the remaining 1/3 and then back to the 2/3 mark. Another 5 seconds later it returns to stop. In other words, it takes what SHOULD be 3 cycles to complete 1 cycle.

 

Also, when the switch is moved to "LO" or "HI", the wipers move as normal, but the blades do NOT return to rest when you turn them back "OFF"... they just stop wherever the blades happen to be. SO I had to time turning off the blades to when the were near rest.

 

I replaced the wiper switch today (partially because the headlight switch was TOAST, and I thought it was probably a switch causing this) but found that unfortunately had no effect.

 

So the next most likely cause would be...? I'm guessing a wiper relay, but didn't have one handy.

I had a similar problem in my BRAT. Replacing the windshield wiper motor fixed my problem.

It's probably the contacts in the wiper motor gearbox. On the gearbox, there should be three screws (maybe four- been a few years) and a wire coming out. That wire is attached to a contact that rides on another contact on the main gear, timing the park position and intermittent operation. Pull the screws, pop the cover off, and see what everything looks like. Chances are that contact is all bent to crap and isn't doing it's job.

The linkage might need some greasing too. Just a thought.