VDIAGTOOL V500 Pro Automotive Circuit Tester Multimeter Oscilloscope 9-30V

• Amazon now offers the VDIAGTOOL V500 Pro automotive circuit tester with multi-function diagnostics, 9-30V, now $159.97 (list price $199.99).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: The most frustrating part of tracking down automotive electrical issues is guessing wire by wire. This tester traces the line to pinpoint open circuits, short circuits, and power drains without tearing everything apart. Beyond basic voltage and resistance measurement, it also features an oscilloscope plus relay and fuel injector testing, doing the job of several tools in one. The screen rotates 90 degrees so you can read the numbers clearly even when you're leaning into the engine bay, and an LED light illuminates dark spots.