{"product_id":"topdiag-p100-circuit-tester-automotive-40ft-cable-power-circuit-probe-12v-24v-car-diagnostic-tool","title":"TopDiag P100 Circuit Tester Automotive – 40ft Cable Power Circuit Probe, 12V\/24V Car Diagnostic Tool","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe TopDiag P100 Circuit Tester is a compact, powerfully capable diagnostic tool designed for automotive electrical systems. It combines multiple testing functions in one handheld unit, built to work with 12V cars and 24V trucks. It handles DC and AC voltage checks, resistance measurements, and circuit tracing with an audible tone, helping you quickly assess electrical parts without needing multiple devices.\u003c\/p\u003e\n\u003ch3\u003eWhat makes it practical\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValue and versatility:\u003c\/strong\u003e Delivers the essential capabilities of higher‑priced testers at a practical price, supporting everyday electrical diagnostics.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTime-saving DIY testing:\u003c\/strong\u003e Trace wiring and identify failing components faster than a traditional multimeter by following signal and readings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e40 ft total reach:\u003c\/strong\u003e A 20 ft extension plus the built-in cable give you enough length to reach the rear of a vehicle or trailer wiring without hunting for ground points.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNight and dim area usability:\u003c\/strong\u003e A built-in flashlight improves visibility in dark compartments or under vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFour smart working modes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDC Voltage:\u003c\/strong\u003e Readings with 0.1 V resolution to verify battery power and circuit voltage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAC Voltage:\u003c\/strong\u003e Capture min and max voltage, plus duty cycle and frequency for AC circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResistance:\u003c\/strong\u003e Measure resistance between the probe tip and an auxiliary ground to check continuity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTone On\/Off:\u003c\/strong\u003e An audible signal helps you locate circuits in noisy or dark environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReal-world use cases\u003c\/h3\u003e\n\u003cp\u003eUse the P100 to probe common automotive components and circuits such as blower motors, power windows, wipers, rear defrosters, headlights, radiator fans, and fuel injectors. It can activate components to gauge if they respond as expected, whether the system is powered or grounded, or if a fault lies in wiring rather than the component itself.\u003c\/p\u003e\n\u003ch3\u003eSafety and reliability\u003c\/h3\u003e\n\u003cp\u003eThe tester includes protective features to help reduce risk during testing. A built-in short‑circuit protection and an internal breaker help prevent overload, while a robust battery clip supports higher current loads. The device is designed to work within a wide input range (9V to 70V), making it compatible with both 12V and 24V automotive systems.\u003c\/p\u003e\n\u003ch3\u003eWhat you get and how to use it\u003c\/h3\u003e\n\u003cp\u003eDesigned for technicians and enthusiasts alike, the P100 is a practical kit for diagnosing automotive electrical issues in the shop or on the go. To use, identify the circuit under test, choose the appropriate mode, connect the probe and ground, and read the voltage, resistance, or signal tones. For best results, combine voltage checks with the load state of components to determine if a part is functioning within expected ranges.\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 does the TopDiag P100 circuit tester do?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It combines voltage, resistance, and tone testing with component activation to help diagnose automotive electrical issues.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the P100 suitable for night work?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it includes a built-in flashlight and a long 40ft cable to reach dim or hard-to-reach areas.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TopDiag","offers":[{"title":"Default Title","offer_id":47469558726830,"sku":"B07YC621J9","price":130.14,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/6012\/9710\/files\/topdiag-p100-circuit-tester-front-view.jpg?v=1770417535","url":"https:\/\/handyskook.ca\/products\/topdiag-p100-circuit-tester-automotive-40ft-cable-power-circuit-probe-12v-24v-car-diagnostic-tool","provider":"HandySkook","version":"1.0","type":"link"}