{"product_id":"digital-voltage-circuit-tester-pen-3v-120v-car-truck-probe","title":"Digital Circuit Tester Pen 3V–120V | Car Truck Voltage Probe","description":"\n\u003ch2\u003eDigital Voltage Circuit Tester Pen — Fast, Easy Electrical Checks\u003c\/h2\u003e\n\u003cp\u003eWhether you're troubleshooting a blown fuse, verifying a switch, or tracing wiring on your car, truck, trailer, boat, or motorcycle, this \u003cstrong\u003eDigital Voltage Circuit Tester Pen\u003c\/strong\u003e makes the job simple. With a wide operating range of \u003cstrong\u003e3V to 120V DC\u003c\/strong\u003e, it covers virtually every low-voltage automotive and marine electrical system. Just clip the alligator clamp to ground, touch the probe to the circuit, and let the bright LED indicator tell you instantly whether the circuit is live — no guesswork, no multimeter needed.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Range:\u003c\/strong\u003e 3V–120V DC — suitable for cars, trucks, boats, motorcycles, trailers, and other low-voltage systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstant LED Indicator:\u003c\/strong\u003e Light illuminates when a live circuit is detected — clear, at-a-glance results\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong Reach Probe:\u003c\/strong\u003e 8.3 cm (3.3\") probe tip reaches into tight connector housings and fuse boxes with ease\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerous Lead Length:\u003c\/strong\u003e 96 cm (37.8\") flexible wire with a 20A alligator clamp for secure grounding\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Pen body is 17.3 cm (6.8\") long and weighs just 130 g — slips easily into a glove box or tool bag\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Plastic body with carbon steel probe for lasting everyday use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Check circuits, fuses, switches, relays, sensors, and wiring harnesses on virtually any DC system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3V – 120V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClamp Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePen Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.3 cm \/ 6.8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProbe Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.3 cm \/ 3.3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLead Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e96 cm \/ 37.8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e130 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic body, Carbon steel probe\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eAttach the alligator clamp to a known ground point on the vehicle or system.\u003c\/li\u003e\n  \u003cli\u003eTouch the probe tip to the wire, terminal, fuse, or connector you want to test.\u003c\/li\u003e\n  \u003cli\u003eIf the LED indicator lights up, the circuit is live and receiving voltage.\u003c\/li\u003e\n  \u003cli\u003eNo light? The circuit is open, the fuse is blown, or there is no power present.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eGreat for Use With\u003c\/h3\u003e\n\u003cp\u003eCars • Trucks • SUVs • Vans • Trailers • Boats • Motorcycles • ATVs • RVs • Low-Voltage DC Systems\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-percent-better-every-day-motivational-canvas-wall-art-print\"\u003e\"1% Better Every Day\" Motivational Canvas Wall Art Print\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor safe electrical work practices in automotive and DIY settings, the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Occupational Safety and Health Administration (OSHA) Electrical Safety Guidelines\u003c\/a\u003e offer authoritative guidance on working safely with electrical systems.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage range does this circuit tester pen support?\u003c\/h4\u003e\n\u003cp\u003eA: This digital voltage circuit tester pen supports a range of \u003cstrong\u003e3V to 120V DC\u003c\/strong\u003e, making it compatible with standard automotive, marine, motorcycle, and trailer electrical systems typically running at 6V, 12V, or 24V.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I use the circuit tester pen on my car or truck?\u003c\/h4\u003e\n\u003cp\u003eA: Simply attach the 20A alligator clamp to a solid ground point (such as the vehicle's chassis or battery negative terminal), then touch the probe tip to the wire, fuse, terminal, or switch you want to test. If the LED indicator illuminates, the circuit has voltage present. If the light stays off, there is no power at that point.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this tester on a boat or motorcycle?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The 3V–120V DC range and robust alligator clamp make this tester suitable for boats, motorcycles, ATVs, trailers, RVs, and any other DC low-voltage system within that range.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this tester safe to use on AC household circuits?\u003c\/h4\u003e\n\u003cp\u003eA: No. This circuit tester pen is designed exclusively for DC systems up to 120V. It is \u003cstrong\u003enot\u003c\/strong\u003e rated or designed for standard AC household mains wiring. Always use the appropriate, properly rated tool for AC electrical work.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the LED indicator light tell me?\u003c\/h4\u003e\n\u003cp\u003eA: When the LED light turns on, it confirms that voltage is present at the tested point — meaning the circuit is live and carrying power. When the light remains off, there is no detected voltage, which can indicate an open circuit, blown fuse, bad connection, or no power supply at that location.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage range does this circuit tester pen support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This digital voltage circuit tester pen supports a range of 3V to 120V DC, making it compatible with standard automotive, marine, motorcycle, and trailer electrical systems typically running at 6V, 12V, or 24V.\"}}, {\"@type\": \"Question\", \"name\": \"How do I use the circuit tester pen on my car or truck?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Simply attach the 20A alligator clamp to a solid ground point (such as the vehicle's chassis or battery negative terminal), then touch the probe tip to the wire, fuse, terminal, or switch you want to test. 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