OK - I'm a little less ranty about this subject today than I was last night.

How do I bench test a voltage limiter? Seems like I'd:

Connect 12v+ to the 12v prong.
Connect a ground to the ground prong.
Connect my voltmeter to the 5V prong and also to the ground prong, and watch for 5V.

Do I need that little condensor thing connected? (And what's that for anyway? To stabilize the 5V pulse?)

FWIW - this is a new solid state limiter from redlinegauges. I just want to confirm it's good before I move on to the next step.