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AV-SCANNER / Accessory guides / Diagnostic
This guide explains how a noid light set lets you verify injector pulse signals without removing injectors or guessing at wiring faults. It covers the different lamp types, how to choose the right one for your vehicle's injector circuit, safe connection methods, and a full step-by-step test procedure. You will learn to read flash patterns, interpret worked examples, and apply the tool to real diagnostic jobs such as misfires and no-starts. By the end you will be able to test injector pulses quickly and confidently, and know when the fault lies beyond the injector circuit.
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 12 sections as a branded PDF to use in the workshop.
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