{"product_id":"junruo-alternator-pigtail-with-96-inch-resistor-wire-for-ls-iii-4-pin-105a-compatible-plug-and-play","title":"JUNRUO Alternator Pigtail with 96-inch Resistor Wire for LS III 4-Pin, 105A Compatible Plug-and-Play","description":"\u003cp\u003e\u003cstrong\u003eJUNRUO's ready-to-install 96\" resistor wire pigtail converts a 12V feed into the correct alternator \"on\" signal so LS III generation 4-pin alternators can be controlled when the ECM signal is absent.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you’re retrofitting, repairing, or replacing an alternator on 1999-and-newer GM LS-series engines that use the 4-terminal flat connector, this pigtail supplies the right voltage to engage the alternator without modifying the vehicle’s wiring harness. The built-in resistor drops incoming 12 volts down to the alternator’s expected control voltage, providing a simple, plug-and-play alternative when the engine control module isn’t providing a field or exciter signal.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this pigtail let an alternator work without an ECM signal?\u003c\/h3\u003e\n\u003cp\u003eThe in-line resistor reduces the raw 12V feed to the lower voltage the alternator’s \"on\" terminal expects, tricking the alternator into switching on. It is a passive solution that requires no programming and installs directly into the alternator's 4-pin flat connector.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBuilt-in resistor creates the correct alternator excitation voltage.\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for LS III Generation 4 4-terminal alternators (1999+ GM LS engines).\u003c\/li\u003e\n  \u003cli\u003e96\" lead length gives flexibility for routing and different engine bay layouts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat connectors and fitments does this pigtail support?\u003c\/h3\u003e\n\u003cp\u003eDesigned for the flat 4-pin alternator connector used on many LS-series GM alternators, the pigtail matches the standard pinout so it plugs straight in. The product is intended to work with alternators up to the 105A rating for which it was specified (WPALT31 style).\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 4-terminal flat connector style common to LS III Generation alternators.\u003c\/li\u003e\n  \u003cli\u003eCompatible with 1999 and newer GM LS engines using the 4-pin configuration.\u003c\/li\u003e\n  \u003cli\u003eDesigned for alternators with output and control characteristics similar to 105A WPALT31 units.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install the 96\" resistor wire pigtail and route it safely?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: disconnect the battery, unplug the stock alternator connector, and plug the JUNRUO pigtail into the alternator. Route the long 96\" lead away from heat and moving parts, secure with zip ties, and reconnect the battery once installed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAlways disconnect battery negative before beginning the install.\u003c\/li\u003e\n  \u003cli\u003eRoute cable clear of exhaust, belts, and steering components.\u003c\/li\u003e\n  \u003cli\u003eUse grommets or zip ties to secure the lead and prevent chafing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this affect charging performance or dashboard warnings?\u003c\/h3\u003e\n\u003cp\u003eThe pigtail supplies the alternator’s excitation signal but does not alter the alternator’s regulated output. It’s a wiring solution to enable alternator engagement; vehicle diagnostics and regulator behavior remain governed by the alternator and vehicle electrical system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDoes not modify alternator internal regulation or charging curve.\u003c\/li\u003e\n  \u003cli\u003eMay not mimic an ECM’s diagnostic signals; some warning systems could still behave differently.\u003c\/li\u003e\n  \u003cli\u003eRecommended for applications where a functional excitation signal is required but ECM control is not present.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: This JUNRUO 96\" resistor wire pigtail is intended for mechanics, hot-rodders, and DIY enthusiasts retrofitting alternators on GM LS-series engines, or for repair shops replacing a faulty alternator pigtail when the ECM’s excitation signal is unavailable. It’s ideal when you need a reliable, long lead, plug-and-play solution that restores alternator \"on\" signaling without rewiring or ECU intervention.\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: Will this pigtail fit my GM LS alternator?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If your alternator uses the 4-terminal flat connector common to 1999+ GM LS engines, this JUNRUO pigtail is compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to modify my ECU to use this resistor wire?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No ECU changes are required; the built-in resistor supplies the alternator \"on\" signal without programming.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JUNRUO","offers":[{"title":"Default Title","offer_id":67591408255161,"sku":"B0CCJXQ9HZ","price":66.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/junruo-pigtail-front-connector.jpg?v=1790549987","url":"https:\/\/redleafauto.ca\/products\/junruo-alternator-pigtail-with-96-inch-resistor-wire-for-ls-iii-4-pin-105a-compatible-plug-and-play","provider":"Redleaf Auto","version":"1.0","type":"link"}