{"product_id":"🚗3-in-1-automotive-power-circuit-probe-relay-tester-12v-24v-electrical-diagnostic-tool-3","title":"🚗3-in-1 Automotive Power Circuit Probe \u0026 Relay Tester – 12V\/24V Electrical Diagnostic Tool","description":"\n\u003cstyle\u003e\n\/* Automotive Circuit Probe \u0026 Relay Tester | Shopify Premium DTC V5 | Scoped *\/\n.acp26{--bg:#f7f8f9;--paper:#fffefe;--ink:#2b3944;--copy:#536571;--red:#b44244;--red2:#8d3138;--blue:#5c879f;--line:#dfe6ea;box-sizing:border-box;display:block;container-type:inline-size;isolation:isolate;overflow:hidden;width:100%;max-width:880px;min-width:0;margin:0 auto;padding:12px;background:var(--bg);color:var(--ink)}\n.acp26 *,.acp26 *::before,.acp26 *::after{box-sizing:border-box;min-width:0}\n.acp26 h2,.acp26 h3,.acp26 p,.acp26 figure,.acp26 dl,.acp26 dt,.acp26 dd{margin:0;max-width:100%;overflow-wrap:anywhere}\n.acp26 img{display:block;width:100%;max-width:100%;height:auto;object-fit:contain}\n.acp26 a{color:inherit}\n.acp26 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51%,#dbedf5);color:#744349!important;font-size:14px;line-height:1.5;font-weight:855;text-align:center;text-decoration:none!important;white-space:normal;overflow-wrap:anywhere;box-shadow:0 10px 23px rgba(26,47,58,.22);transition:transform .25s ease,box-shadow .25s ease}\n.acp26 .ap-btn:active{transform:scale(.985)}\n.acp26 .ap-foot{margin-top:10px;color:#e6f1f5;font-size:11.5px;line-height:1.6;font-weight:600}\n@container (min-width:600px){.acp26{padding:16px}.acp26 .ap-card{padding:32px 33px;border-radius:26px}.acp26 .ap-title{font-size:35px}.acp26 .ap-title--hero{font-size:42px}.acp26 .ap-copy{font-size:16px}.acp26 .ap-photo{margin-top:24px}.acp26 .ap-minis,.acp26 .ap-bundles,.acp26 .ap-colors{grid-template-columns:repeat(3,minmax(0,1fr))}.acp26 .ap-uses{grid-template-columns:repeat(4,minmax(0,1fr))}.acp26 .ap-spec{grid-template-columns:minmax(0,.34fr) minmax(0,.66fr);gap:15px;align-items:center}}\n@media (hover:hover) and (pointer:fine){.acp26 .ap-card:hover{transform:translateY(-2px);border-color:#cfdbdf;box-shadow:0 18px 34px rgba(45,63,77,.085)}.acp26 .ap-mini:hover{transform:translateY(-3px);box-shadow:0 10px 22px rgba(45,63,77,.08)}.acp26 .ap-marquee:hover .ap-track{animation-play-state:paused}.acp26 .ap-btn:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(26,47,58,.29)}}\n@media (prefers-reduced-motion:reduce){.acp26 .ap-title,.acp26 .ap-kicker,.acp26 .ap-track{animation:none!important}.acp26 .ap-card,.acp26 .ap-mini,.acp26 .ap-btn{transition:none!important}}\n\u003c\/style\u003e\n\n\u003csection class=\"acp26\" id=\"acp26-probe\" aria-label=\"3-in-1 automotive power circuit probe and relay tester product details\"\u003e\n\u003cdiv class=\"ap-stack\"\u003e\n\n\u003c!-- 01 HERO --\u003e\n\u003cdiv class=\"ap-card ap-hero\"\u003e\n\u003cspan class=\"ap-kicker\"\u003eVOLTAGE · POLARITY · RELAYS · COMPONENTS\u003c\/span\u003e\n\u003ch2 class=\"ap-title ap-title--hero\"\u003eStop Guessing. Start Finding the Fault.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eAn electrical problem shouldn't mean replacing parts at random. This 3-in-1 automotive power probe puts live voltage checks, polarity identification, compatible component activation and relay testing into one hands-on diagnostic tool.\u003c\/p\u003e\n\u003cdiv class=\"ap-tags\"\u003e\n\u003cspan class=\"ap-tag\"\u003e⚡ DC 3.5–36V\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🔎 Digital Voltage Display\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🔧 4\/5-Pin Relay Tester\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_30.png?v=1784879327\" alt=\"Red 3-in-1 automotive circuit tester with LCD, long cable, red and black battery clips and pointed probe\" loading=\"eager\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- FEATURE MARQUEE --\u003e\n\u003cdiv class=\"ap-marquee\" aria-label=\"Tester highlights\"\u003e\n\u003cdiv class=\"ap-track\" aria-hidden=\"true\"\u003e\n\u003cdiv class=\"ap-trackunit\"\u003e\n\u003cspan\u003eREAD THE VOLTAGE\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003cspan\u003eIDENTIFY POLARITY\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003cspan\u003eCHECK THE RELAY\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003cspan\u003eTEST THE COMPONENT\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-trackunit\"\u003e\n\u003cspan\u003eREAD THE VOLTAGE\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003cspan\u003eIDENTIFY POLARITY\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003cspan\u003eCHECK THE RELAY\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003cspan\u003eTEST THE COMPONENT\u003c\/span\u003e\u003cb\u003e✦\u003c\/b\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- 02 PROBLEM --\u003e\n\u003cdiv class=\"ap-card ap-rose\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e01 \/ LESS SWITCHING BETWEEN TOOLS\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eToo Many Testers. Too Many Loose Ends.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eA light won't turn on. A fan stops responding. A relay might be faulty—or the wiring might be the real problem. Instead of bouncing between a test light, jumper leads and different tools for every question, start with one organized diagnostic probe.\u003c\/p\u003e\n\u003cdiv class=\"ap-note\"\u003eFind out what's happening in the circuit before you start buying replacement parts.\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_34.png?v=1784879327\" alt=\"Original side-by-side comparison showing multiple car electrical testing instruments and one all-in-one circuit tester\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 03 VOLTAGE --\u003e\n\u003cdiv class=\"ap-card ap-frost\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e02 \/ SEE WHAT THE CIRCUIT IS DOING\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eRead Voltage and Polarity at a Glance.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eTouch an accessible test point and watch the backlit LCD show DC voltage. Red and green indicators help distinguish positive power from ground, so the next troubleshooting step feels a lot clearer.\u003c\/p\u003e\n\u003cdiv class=\"ap-numbers\"\u003e\n\u003cdiv class=\"ap-number\"\u003e\n\u003cstrong\u003e3.5–36V\u003c\/strong\u003e\n\u003cspan\u003eSeller-listed DC test range\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-number\"\u003e\n\u003cstrong\u003eRed \/ Green\u003c\/strong\u003e\n\u003cspan\u003ePower and ground indicators\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_38.png?v=1784879326\" alt=\"Red power circuit tester measuring an automotive connector with blue backlit digital display and positive and negative lights\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 04 ACTIVATION --\u003e\n\u003cdiv class=\"ap-card ap-metal\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e03 \/ TEST THE PART BEFORE REPLACING IT\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eIs It the Wiring—or the Component Itself?\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eApply positive or negative battery power through the probe to activate appropriately rated DC components for testing. Check the response of compatible lights, fans, horns or motors and make a more informed repair decision.\u003c\/p\u003e\n\u003cdiv class=\"ap-tags\"\u003e\n\u003cspan class=\"ap-tag\"\u003e💡 Lights\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🌀 Fans\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e⚙️ Motors\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e📢 Horns\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_41.png?v=1784879326\" alt=\"Electrical power probe used to activate a compatible automotive fan with the display and clamp cables shown\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 05 RELAY --\u003e\n\u003cdiv class=\"ap-card ap-rose\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e04 \/ CHECK THE RELAY RIGHT ON THE TOOL\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eA Dedicated Check for 4-Pin and 5-Pin Relays.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eThe tester includes relay sockets for selected common automotive four- and five-pin layouts. Verify the relay's pin arrangement, connect the tool to its compatible battery source and use the testing controls to evaluate relay operation.\u003c\/p\u003e\n\u003cdiv class=\"ap-numbers\"\u003e\n\u003cdiv class=\"ap-number\"\u003e\n\u003cstrong\u003e4-Pin\u003c\/strong\u003e\n\u003cspan\u003eCompatible common relay layouts\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-number\"\u003e\n\u003cstrong\u003e5-Pin\u003c\/strong\u003e\n\u003cspan\u003eAdditional compatible relay layouts\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImageJul24_2026_05_07_01AM.png?v=1784884040\" alt=\"Four- and five-pin automotive relay testing feature using the integrated sockets on the red circuit diagnostic tool\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 06 LED --\u003e\n\u003cdiv class=\"ap-card ap-frost\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e05 \/ LIGHT UP THE PLACE YOU'RE TESTING\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eSee the Connector, Not Just the Dashboard.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eTwo small LED work lights near the probe tip help illuminate terminals and wires in engine bays, fuse compartments and darker under-dash spaces. It's a practical detail when the fault is tucked somewhere inconvenient.\u003c\/p\u003e\n\u003cdiv class=\"ap-tags\"\u003e\n\u003cspan class=\"ap-tag\"\u003e🔦 Dual Tip LEDs\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🚗 Engine Bays\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🔌 Connectors \u0026amp; Terminals\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_48.png?v=1784879326\" alt=\"Dual integrated LED lamps on automotive probe lighting a wire connector in a dark engine compartment\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 07 COMPATIBILITY --\u003e\n\u003cdiv class=\"ap-card ap-metal\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e06 \/ FOR THE VEHICLES IN YOUR GARAGE\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eFrom Everyday Cars to 24V Work Vehicles.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eThe tester is designed for compatible 12V and 24V vehicle DC electrical systems. That makes it useful across a wide variety of vehicle maintenance situations, from a personal car to a work truck or camper.\u003c\/p\u003e\n\u003cdiv class=\"ap-uses\"\u003e\n\u003cspan class=\"ap-use\"\u003e🚙 Cars \u0026amp; SUVs\u003c\/span\u003e\n\u003cspan class=\"ap-use\"\u003e🛻 Trucks \u0026amp; Vans\u003c\/span\u003e\n\u003cspan class=\"ap-use\"\u003e🚐 RVs \u0026amp; Campers\u003c\/span\u003e\n\u003cspan class=\"ap-use\"\u003e🏍️ Motorcycles\u003c\/span\u003e\n\u003cspan class=\"ap-use\"\u003e🚤 Marine DC\u003c\/span\u003e\n\u003cspan class=\"ap-use\"\u003e🚜 Work Vehicles\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_52.png?v=1784879327\" alt=\"Original vehicle compatibility visual featuring cars trucks RVs motorcycle boat and 12V 24V circuit tester\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 08 USE STEPS --\u003e\n\u003cdiv class=\"ap-card ap-frost\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e07 \/ AN EASIER TROUBLESHOOTING ROUTINE\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eConnect. Check. Make the Next Move.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eThe tool is powered from a compatible vehicle battery. With the probe connected, you can examine accessible points, interpret the LCD and polarity indicators, then follow the specific diagnostic procedure for your vehicle or component.\u003c\/p\u003e\n\u003cdiv class=\"ap-list\"\u003e\n\u003cdiv class=\"ap-line\"\u003e\n\u003cspan class=\"ap-index\"\u003e01\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnect the battery clamps\u003c\/strong\u003e\n\u003cspan\u003eAttach the red and black leads to the correct battery terminals as directed by the manual.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-line\"\u003e\n\u003cspan class=\"ap-index\"\u003e02\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eChoose a suitable test point\u003c\/strong\u003e\n\u003cspan\u003eUse the probe on an appropriate terminal or wire for a voltage or polarity check.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-line\"\u003e\n\u003cspan class=\"ap-index\"\u003e03\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRead and narrow down the issue\u003c\/strong\u003e\n\u003cspan\u003eObserve the voltage reading, positive\/negative status and other test results.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-line\"\u003e\n\u003cspan class=\"ap-index\"\u003e04\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eUse the dedicated function when needed\u003c\/strong\u003e\n\u003cspan\u003eTest compatible components or relays according to their wiring and ratings.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- 09 COLORS --\u003e\n\u003cdiv class=\"ap-card ap-rose\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e08 \/ PICK YOUR WORKSHOP LOOK\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eThree Finishes. The Same Diagnostic Approach.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eThe storefront currently offers Red, Blue and Black body colors. Choose your preferred finish in the product selector before checkout.\u003c\/p\u003e\n\u003cdiv class=\"ap-colors\"\u003e\n\u003cdiv class=\"ap-color\"\u003e\n\u003cstrong\u003e\u003ci class=\"ap-swatch\" style=\"background:#c53237\"\u003e\u003c\/i\u003e Red\u003c\/strong\u003e\n\u003cp\u003eThe bold red edition featured in the original demonstration images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-color\"\u003e\n\u003cstrong\u003e\u003ci class=\"ap-swatch\" style=\"background:#3078d8\"\u003e\u003c\/i\u003e Blue\u003c\/strong\u003e\n\u003cp\u003eA bright workshop-blue alternative.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-color\"\u003e\n\u003cstrong\u003e\u003ci class=\"ap-swatch\" style=\"background:#282d35\"\u003e\u003c\/i\u003e Black\u003c\/strong\u003e\n\u003cp\u003eA clean, understated dark finish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- 10 WHAT'S IN THE KIT --\u003e\n\u003cdiv class=\"ap-card ap-metal\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e09 \/ THE CORE GEAR FOR CIRCUIT TESTING\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eThe Probe, Power Leads and Relay Testing in One Kit.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eThe seller lists a circuit and relay tester, long power cable, red and black battery clamps, probe tip and user manual. The all-in-one setup helps keep the essentials together for your next troubleshooting session.\u003c\/p\u003e\n\u003cdiv class=\"ap-tags\"\u003e\n\u003cspan class=\"ap-tag\"\u003e🔧 Probe Tool\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🔴⚫ Battery Clamps\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e〰️ Long Cable\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"ap-photo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_56.png?v=1784879327\" alt=\"Automotive voltage and relay tester kit with red probe, connected coiled power lead, two battery clamps and relay demonstration\" loading=\"lazy\" decoding=\"async\"\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\n\u003c!-- 11 BUNDLES --\u003e\n\u003cdiv class=\"ap-card ap-frost\"\u003e\n\u003cspan class=\"ap-kicker\"\u003e10 \/ CHOOSE YOUR TOOLBOX SETUP\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eOne for Your Garage—or More for the Team.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eChoose the color and the quantity that fit your needs. The store lists individual and multiple-unit bundles, while the actual purchase selector controls the final price and available combinations.\u003c\/p\u003e\n\u003cdiv class=\"ap-bundles\"\u003e\n\u003cdiv class=\"ap-bundle\"\u003e\n\u003cstrong\u003eBuy 1\u003c\/strong\u003e\n\u003cb\u003eOne tester kit\u003c\/b\u003e\n\u003cp\u003eFor your garage, shop or personal vehicle maintenance tools.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-bundle\"\u003e\n\u003cstrong\u003eBuy 2\u003c\/strong\u003e\n\u003cb\u003eExtra 10% off listed bundle\u003c\/b\u003e\n\u003cp\u003eTwo tools for separate technicians or work locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-bundle\"\u003e\n\u003cstrong\u003eBuy 3\u003c\/strong\u003e\n\u003cb\u003eExtra 15% off listed bundle\u003c\/b\u003e\n\u003cp\u003eThree kits for workshop teams or multiple toolboxes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- 12 HIGHLIGHTS --\u003e\n\u003cdiv class=\"ap-card\"\u003e\n\u003cspan class=\"ap-kicker\"\u003ePRODUCT HIGHLIGHTS\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eThree Diagnostic Jobs. One Practical Probe.\u003c\/h2\u003e\n\u003cdiv class=\"ap-minis\"\u003e\n\u003cdiv class=\"ap-mini\"\u003e\n\u003cb\u003e📟\u003c\/b\u003e\n\u003ch3\u003eVoltage \u0026amp; Polarity Checks\u003c\/h3\u003e\n\u003cp\u003eSee DC voltage on the backlit display and identify power or ground.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-mini\"\u003e\n\u003cb\u003e⚡\u003c\/b\u003e\n\u003ch3\u003eCompatible Component Testing\u003c\/h3\u003e\n\u003cp\u003eSupply positive or negative power to appropriately rated parts for diagnosis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-mini\"\u003e\n\u003cb\u003e🔌\u003c\/b\u003e\n\u003ch3\u003eIntegrated Relay Testing\u003c\/h3\u003e\n\u003cp\u003eCheck selected 4-pin and 5-pin relay configurations with the built-in sockets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- 13 SPECIFICATIONS --\u003e\n\u003cdiv class=\"ap-card ap-metal\"\u003e\n\u003cspan class=\"ap-kicker\"\u003eTECHNICAL SPECIFICATIONS\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eThe Details Behind the Diagnostic Tool.\u003c\/h2\u003e\n\u003cdl class=\"ap-specs\"\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003e3-in-1 Automotive Power Circuit Probe \u0026amp; Relay Tester\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eTest Functions\u003c\/dt\u003e\n\u003cdd\u003eDC voltage, polarity, continuity, compatible component activation and relay checks\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eDC Voltage Range\u003c\/dt\u003e\n\u003cdd\u003e3.5–36V, seller-listed\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eVehicle Electrical Systems\u003c\/dt\u003e\n\u003cdd\u003eCompatible 12V \/ 24V DC systems\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eRelay Configurations\u003c\/dt\u003e\n\u003cdd\u003eSelected common 4-pin and 5-pin automotive relays\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eDisplay\u003c\/dt\u003e\n\u003cdd\u003eBacklit LCD digital voltage readout with red\/green polarity indicators\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eWork Lights\u003c\/dt\u003e\n\u003cdd\u003eDual LED lights positioned near the probe tip\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eCurrent \u0026amp; Protection\u003c\/dt\u003e\n\u003cdd\u003eSeller lists 1–8A and integrated overload protection up to approximately 8A\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eOperating Conditions\u003c\/dt\u003e\n\u003cdd\u003eApprox. −10°C to 60°C; relative humidity ≤80%, seller-listed\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003ePower Source\u003c\/dt\u003e\n\u003cdd\u003eConnected compatible vehicle battery through red\/black clamps\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003eColor Options\u003c\/dt\u003e\n\u003cdd\u003eRed \/ Blue \/ Black\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003ePackage Contents\u003c\/dt\u003e\n\u003cdd\u003e1 tester, 1 long power cable, red and black battery clamps, probe tip and manual, as listed\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ap-spec\"\u003e\n\u003cdt\u003ePurchase Quantities\u003c\/dt\u003e\n\u003cdd\u003eBuy 1 \/ Buy 2 (extra 10% off) \/ Buy 3 (extra 15% off)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\n\u003c\/div\u003e\n\n\u003c!-- 14 FAQ --\u003e\n\u003cdiv class=\"ap-card ap-rose\"\u003e\n\u003cspan class=\"ap-kicker\"\u003eQUESTIONS BEFORE THE NEXT REPAIR\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eFrequently Asked Questions.\u003c\/h2\u003e\n\u003cdiv class=\"ap-faq\"\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWill it work on both 12V and 24V vehicles?\u003c\/summary\u003e\n\u003cp\u003eYes. The seller specifies use with compatible 12V and 24V automotive DC systems, with a listed DC measurement range of 3.5–36V.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDoes it display the actual circuit voltage?\u003c\/summary\u003e\n\u003cp\u003eYes. The backlit LCD displays DC voltage, and the red and green indicators help distinguish positive power from ground.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan it test 4-pin and 5-pin relays?\u003c\/summary\u003e\n\u003cp\u003eThe integrated sockets support selected common four- and five-pin automotive relay configurations. Check each relay's diagram and rating before testing.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan it supply power to a fan, horn or light?\u003c\/summary\u003e\n\u003cp\u003eIt can supply positive or negative battery power through the probe for suitably rated DC components. Always identify the correct terminal and verify the manufacturer's current and wiring specifications before activating anything.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDoes the tester need separate batteries?\u003c\/summary\u003e\n\u003cp\u003eThe original listing states that it receives power from the connected vehicle battery through its red and black clamps.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDoes it include a flashlight?\u003c\/summary\u003e\n\u003cp\u003eThe body incorporates two LED work lights near the probe tip to help illuminate wiring and terminals.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs this the same as an OBD2 code scanner?\u003c\/summary\u003e\n\u003cp\u003eNo. It is a handheld circuit probe and relay testing tool, not an OBD code reader or ECU programming device.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use it on household electrical outlets?\u003c\/summary\u003e\n\u003cp\u003eNo. It is designed for compatible vehicle DC circuits only, not household AC mains voltage.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat comes with the purchase?\u003c\/summary\u003e\n\u003cp\u003eThe seller lists one circuit and relay tester, a long power cable, red and black battery clamps, a probe tip and a user manual for each single kit.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhich colors and bundle options are available?\u003c\/summary\u003e\n\u003cp\u003eThe storefront lists Red, Blue and Black with Buy 1, Buy 2 and Buy 3 quantity options. Choose the final configuration in the product selector.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- 15 CTA --\u003e\n\u003cdiv class=\"ap-card ap-end\"\u003e\n\u003cspan class=\"ap-kicker\"\u003eGET CLEARER ANSWERS BEFORE YOUR NEXT REPAIR\u003c\/span\u003e\n\u003ch2 class=\"ap-title\"\u003eFind the Circuit Problem. Make the Repair Count.\u003c\/h2\u003e\n\u003cp class=\"ap-copy\"\u003eOne handheld tester for voltage, polarity, compatible component checks and relay diagnostics. Add a more organized way to troubleshoot vehicle electrical problems to your toolbox.\u003c\/p\u003e\n\u003ca class=\"ap-btn\" href=\"#\" aria-label=\"Return to the tester color and bundle purchase options at the top of this page\"\u003eChoose Your Circuit Tester ↑\u003c\/a\u003e\n\u003cp class=\"ap-foot\"\u003eBack to the Red \/ Blue \/ Black options and Buy 1 \/ Buy 2 \/ Buy 3 selections above.\u003c\/p\u003e\n\u003cdiv class=\"ap-tags\"\u003e\n\u003cspan class=\"ap-tag\"\u003e🚗 12V \/ 24V DC\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e📟 Backlit LCD\u003c\/span\u003e\n\u003cspan class=\"ap-tag\"\u003e🔧 Relay + Circuit Testing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"WRQ","offers":[{"title":"Red","offer_id":67833571705198,"sku":"NC02222607242102- EM286(4米）红色","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":67833571737966,"sku":"NC02222607242102-EM286（4米）蓝色","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":67833571770734,"sku":"NC02222607242102-EM286（4米）黑色","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/6499\/4414\/files\/ChatGPTImage2026_7_24_03_46_30.png?v=1784879327","url":"https:\/\/bvuyomi.com\/products\/%f0%9f%9a%973-in-1-automotive-power-circuit-probe-relay-tester-12v-24v-electrical-diagnostic-tool-3","provider":"Bvuyomi","version":"1.0","type":"link"}