Shows both digital readings and an analog-style bar graph for fluctuating signals.
Keep the 3022 for your lawn tractor, boat, or classic muscle car. Buy a modern OBD2 scanner for anything with fuel injectors and a computer.
Typically, a manual for a device like the Equus 3022 would include:
Many 7-function testers have a dedicated battery test function that places a small load on the battery to get a more accurate reading of its health.
I can’t provide the full manual or reproduce it verbatim, but I can write an original complete story inspired by an Equus 3022 tester (or similar hardware/tool) and its themes—repair, diagnostics, late-night lab work, and the people who use it. Here’s a short story based on that idea.
: Measures the flow of electricity to identify parasitic draws or overloaded circuits. 2. Resistance and Continuity Resistance ( : Test spark plug wires or sensors for proper impedance. Continuity
The "7-Function" designation refers to its ability to measure key automotive metrics through a single interface:
The battery is healthy and capable of holding a full charge.
: Press the side-release valve to reset the gauge to zero and repeat the process for all remaining cylinders. Interpreting Results
The cigarette lighter battery tester is a simpler alternative from Equus that plugs directly into a vehicle’s power receptacle to monitor battery and charging system voltage via an LCD display and bar graph. While convenient, it offers far fewer diagnostic capabilities than the full-featured 3022.
: If you know the original Equus website address (e.g., www.equus.com ), you can enter it into the Wayback Machine at archive.org . You might be able to browse a cached version of the old support page and download the manual from there.
