How do I check for continuity on a Kenmore 90 series dryer (model 110.66912691?)

On what part? There are many parts that require " continuity", door switch, fill level, heaters and safeties, control panel etc. What is the issue?

Look at these: https://dl.dropboxusercontent.com/u/8010163/How%20to%20use%20Test%20Equipment%20Service%20Manu al.pdf
https://dl.dropboxusercontent.com/u/8010163/Whirlpool%20Dryers.zip
https://dl.dropboxusercontent.com/u/8010163/Kenmore%20Dryer%20Manuals.zip