Untested. Unsure if working or not. This vintage Sears Craftsman Engine Analyzer is a must-have for any automotive enthusiast. It is capable of testing 12 and 24 Volt systems in motorcycles, passenger vehicles, and heavy-duty/commercial vehicles. The analog display type provides accurate readings for any automotive repair job. This item comes with user guide, wire probes, and clamps for easy testing. Its brand, Craftsman, ensures high-quality performance. Don't miss out on this essential tool for all your automotive diagnostic needs.