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If you’ve misplaced your physical copy and are waiting for your to download, here is a quick reference for common tests: 1. Testing Battery Voltage (DCV) Turn the dial to the DCV (Direct Current Voltage) setting. Plug the black lead into COM and the red lead into V/Ω .
Modern automotive electronics are sensitive. Using a multimeter incorrectly can not only lead to false readings but could potentially damage your vehicle's ECU or blow the internal fuse of the tester. The manual provides:
This almost always indicates a low 9V battery inside the unit. equus 4320 manual pdf
This is crucial for automotive work. It prevents the tool from drawing too much current, which protects sensitive onboard computers.
Touch the red lead to the positive battery terminal and black to the negative. If you’ve misplaced your physical copy and are
Always keep a digital copy of your tool manuals in a dedicated folder on Google Drive or Dropbox. That way, you’re never stuck under a hood without the specs you need.
Measures AC/DC voltage, resistance, diode health, and even transistor gain (hFE). How to Use the Equus 4320: Quick Start Guide Modern automotive electronics are sensitive
Set the dial to the icon (looks like a sound wave). Touch the leads together to ensure the "beep" sounds.
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