{"product_id":"topdiag-p100-circuit-tester-automotive-power-circuit-probe-40ft-cable-12v-24v-car-diagnostic-tool","title":"TopDiag P100 Circuit Tester – Automotive Power Circuit Probe, 40ft Cable, 12V\/24V Car Diagnostic Tool","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe TopDiag P100 Circuit Tester is a compact, handheld automotive diagnostic tool designed for quick, confident electrical checks. It delivers essential functionality at a value-friendly price, helping you move from uncertainty to a verifiable reading without a pile of tools.\u003c\/p\u003e\n\u003cp\u003eWith a total reach of 40 feet (a 20-foot built-in cable plus a 20-foot extension), it helps you access hard-to-reach harnesses and trailer wiring while keeping a single ground reference. The built-in flashlight improves visibility in dim engine bays, making small wires and connectors easier to locate.\u003c\/p\u003e\n\n\u003ch3\u003eCore capabilities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWide voltage range from 9V to 70V, compatible with 12V cars and 24V trucks\u003c\/li\u003e\n\u003cli\u003eDC voltage measurement with 0.1V resolution for precise checks\u003c\/li\u003e\n\u003cli\u003eAC voltage measurement with min\/max, duty cycle, and frequency\u003c\/li\u003e\n\u003cli\u003eResistance measurement between the probe tip and auxiliary ground\u003c\/li\u003e\n\u003cli\u003eTone On\/Off mode to help trace circuits in dim areas\u003c\/li\u003e\n\u003cli\u003eTotal cable length supports 40ft reach when needed\u003c\/li\u003e\n\u003cli\u003eBuilt-in flashlight for night-time or dark work environments\u003c\/li\u003e\n\u003cli\u003eRobust battery clips designed for higher-load testing\u003c\/li\u003e\n\u003cli\u003eInternal short-circuit protection to help reduce risk during use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWorking modes in detail\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDC Voltage mode for voltage readings with 0.1V precision\u003c\/li\u003e\n\u003cli\u003eAC Voltage mode showing min, max, duty cycle, and frequency\u003c\/li\u003e\n\u003cli\u003eResistance mode to measure continuity between tip and ground\u003c\/li\u003e\n\u003cli\u003eTone On\/Off mode to audibly identify active circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePractical testing scenarios\u003c\/h3\u003e\n\u003cp\u003eIn everyday workshops or DIY garages, use the P100 to verify power to components such as blower motors, power windows, wipers, and defrosters. The long reach helps you test rear harnesses and trailer connections without scrambling for a grounding point.\u003c\/p\u003e\n\u003cp\u003eYou can also activate components on\/off for quick integrity checks, test circuits with live wiring, and employ the tone feature to follow a path through the harness in dim lighting.\u003c\/p\u003e\n\n\u003ch3\u003eSafety, setup, and compatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned with safety in mind, the P100 includes overload protection via an internal circuit breaker and sturdy battery clips. It supports a broad input range and is suitable for both personal DIY tasks and more involved automotive work.\u003c\/p\u003e\n\n\u003ch3\u003eWhy choose TopDiag P100\u003c\/h3\u003e\n\u003cp\u003eFor technicians and enthusiasts, the P100 blends practical capability with clear value. It can speed up diagnosis, reduce guesswork, and adapt to a wide range of wiring tasks. Consider it a versatile helper with potential benefits across many automotive projects.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What can I diagnose with the TopDiag P100 Circuit Tester?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It helps pinpoint electrical issues, test DC\/AC voltage, measure resistance, and trace circuits in automotive wiring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the P100 compatible with both 12V cars and 24V trucks?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it supports 9–70V input, covering most 12V and 24V automotive systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TopDiag","offers":[{"title":"Default Title","offer_id":53088959299695,"sku":"B07YC621J9","price":76.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/topdiag-p100-circuit-tester-front-view.jpg?v=1778680754","url":"https:\/\/taskholt.com\/products\/topdiag-p100-circuit-tester-automotive-power-circuit-probe-40ft-cable-12v-24v-car-diagnostic-tool","provider":"TaskHolt","version":"1.0","type":"link"}