: Overload protection on all ranges, internal fuse system, and insulated test leads. Display : Clear LCD screen with auto-polarity indicators. Primary Operational Modes & Dial Settings
: AC/DC Voltage, DC Current, Resistance (Ohms), Continuity, and Battery Load.
Plugging into the Data Link Connector (DLC) to pull active and pending trouble codes.
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This document provides a comprehensive guide to the Equus 4320 Digital Battery and System Tester, including safety precautions, operating procedures, testing methodologies, and troubleshooting. The device is designed for 12V lead-acid batteries (flooded, AGM, gel, and starting batteries) and charging systems in automotive applications.
If you have landed on this page, you are likely searching for the . Whether you have lost the physical copy that came with your unit or you bought a used multimeter without documentation, finding the official user manual is critical for safe and accurate testing.
: It explicitly details how to connect leads (e.g., Red to VΩHz, Black to COM) for different functions, reducing the risk of "blown fuses" caused by incorrect settings . : Overload protection on all ranges, internal fuse
If you tried to measure current and the screen stays at zero, you likely blew the internal fuse by connecting it in parallel instead of series. You will need to open the back cover (refer to the manual) to replace the fuse.
A complete Equus 4320 Multimeter User Manual is available for viewing on Scribd.
The manual dedicates two full pages to common errors: Plugging into the Data Link Connector (DLC) to
The Wayback Machine sometimes has cached versions of old Equus product pages. Try searching https://web.archive.org/web/*/equus.com/manuals/4320.pdf .
Features a hydrostatic transmission paired with a two-stage transfer case for optimal torque management.
For decades, the has been a staple in the garages of DIY mechanics and professional technicians alike. Known for its reliability in performing ignition system tests on both domestic and import vehicles, this analog/digital multimeter is a powerful tool—but only if you know how to use it correctly.
