Snap-on Technologies, Inc.

Snap-on Inc.

Mark R Schaefer

Craig F Govekar

Dean P Pfefferle

Larry G Moller

Anwar Suharno

Bruce W Gaunt

Robert D Johnson

Michael M Meeker

Daniel Mieczkowski

A handheld dual voltage circuit tester, method and electronic circuit that quickly allows a technician to determine whether an automotive electrical system runs on a 12-14 volt circuit or 36-42 volt circuit. The tester may be used for automobiles having a single voltage electrical system, or automobiles with distinct electrical systems operating on one of a 12-14 volts circuit or a 36-42 volt circuit. The tester includes a screwdriver-type elongated handle and probe tip. The tester also includes electronic circuitry disposed within its handle, heat shrink tubing, a conductive spring assembly, a strain relief, a retractable coil cord, a ground clip and insulation that encloses the ground clip. The tester also includes electronic circuitry that emits light of a first color when a 12-14 volt circuit is sensed, and light of a second color when a 36-42 volt circuit is sensed.

Dual voltage circuit tester

Cart-housing for automotive service equipment

Quick system tester

Growing community of inventors

Greendale, WI, United States of America

Mark R Schaefer