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AV-SCANNER / Accessory guides / Battery and electrical
This guide covers the complete workflow for using a battery load tester to evaluate a vehicle battery's true condition under a simulated starting load. It explains the different tester types, how to select the right one for your work, and how to connect it safely without damaging the vehicle's electronics. You will learn to run a load test step by step, interpret the voltage readings with worked examples, and diagnose common battery faults that a simple voltmeter cannot reveal. The guide also covers calibration checks, care of the tester, and the point at which a professional should take over.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 11 sections as a branded PDF to use in the workshop.
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