GE Profile Range - left front burner not ON

The left front element on the glasstop range suddenly not working today.
The back element is OK.
The bridge element doesn’t work too.

I took out the element switch and not sure how to test it.
It has the 6 connections:

  • S1: red
  • S2 : two wires: red & red/white
  • 2: yellow
  • 4 : yellow/red
  • 4a : yellow/black
  • P1: black

I tested the voltage between the connectors going into the heating element and it reads 0 v. For the back element, it reads 110v.
I am wondering what is that White box before going to the heating element.
http://i.imgur.com/L0HwhN6.jpg Is it possible that it is broken? & How to test it? Can it be replaced?

UPDATE:

I did more troubleshooting…
I found that the voltage between the connector to the heating element is 0v.
However, the voltage is 110v between one connector and the body. Same for the other connector…

Wondering what would be the problem?
See pic at http://imgur.com/MxvYFC7

Thanks for any help