On Thu, 18 Aug 2011 16:12:05 -0700 (PDT), wrote:

1. House Side:http://picturepush.com/public/6347599
2. Pump Side:http://picturepush.com/public/6347607
3. Well Side:http://picturepush.com/public/6347612

One box is unused.

I think you've helped me clarify the three boxes - but the fourth is
definitely used. There is 'stuff' inside the box. And, it's wired.

I don't know what that stuff is doing though ...

In daylight, tomorrow, I can snap a picture of the INSIDE of that fourth
box to see what it does.

But, so far, we have this:
1. Box1 is the circuit breaker
2. Box2 is the controller for the 3-wire submersed well pump
3. Box3 is the dry-well pump-protection circuit (times out for 30 minutes)
4. Box4 is ???