It's a Diagnostic software that enables users to perform diagnostics for agricultural and construction equipment as well as engines made by John Deere. The Electronic Data Link (EDL) is a dealer diagnostic PC-to-vehicle interface that's compatible with Service ADVISOR software. You can access service manuals and technical assistance center (DTAC) data using a service advisor to perform diagnostics, readings, tests, calibrations, and re-program controllers. Discover comprehensive workshop and repair manuals for John Deere Backhoe Loaders, Compact Track Loaders, Crawler Dozers, Crawler Loaders, Excavators, 4WD Loaders, Landscape Loaders, Motor Graders, Pull-Type Scrapers, Scraper Tractors, Skid Steers, Waste Equipment, and Worksite Pro Attachments. The John Deere Service Advisor provides dealer technical assistance, diagnostics, connection readings, calibrations, interactive tests, specifications, tools, and instructions for assembly and disassembly.