Here is a closeup of the green lights during a good antiskid test.  Notice the lights stutter just a little as he lets his finger off the button.

I have seen a couple of failed antiskid boxes where the lights extinguished perfectly when the button was released.  Not sure why that is?

 

 

Here is the voltage applied to the servo during a successful ground test.  Starts at 3.5 and decays toward .9, untill the lights come back on.

 

Failed test.  Only goes to 1.4vdc, and brakes never release.  1 second later, the menelco pops red, and the lights never come back until you release the pedals.

 

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