Answer Hello Doug. You will test the switch WD21X10261 for continuity. It should read closed with the lid closed, and open with the lid open. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. Hope this helps.http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Tuesday, July 12, 2011