Manufacturers' dishwasher diagrams are available at SearsPartsDirect.com, GEApplianceParts.com and PartSelect.com, as of July 2015. PartSelect has diagrams for many dishwasher brands, including Admiral, Frigidaire and Magic Chef.
Sears PartsDirect has several dishwasher diagrams, including schematics for models from Whirlpool, KitchenAid and Bosch. The website breaks down each dishwasher component into a separate illustration, which offers increased visibility. GE Appliances also provides dishwasher diagrams for its product line, as well as replacement parts for many of the appliances referenced in the diagrams. PartSelect labels each section of the schematic and provides scrolling capability for people who need to see a particular part from a different vantage point.