Answer Hello Steven. Testing the water level sensor. Approximately 14VDC is supplied to the water level sensor through the black/white-brown at the connector. If approximately 14VDC is not present at the sensor, check the supply voltage at the main control board, terminal P8, pin 3 and 6. If voltage is present, then check the wire and connections. If voltage is not present, replace the main control board. When the sump is empty, approximately 0 VDC will display on the meter through yellow/red-brown at the water level sensor connector. When water is present in the sump, the meter will display approximately 5 VDC through yellow/red-brown at the water level sensor connector. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Tuesday, June 16, 2015