{"product_id":"larlansz-12v-universal-power-window-switch-kit-for-2-door-cars-3-prewired-switches-harnesses-inline-fuse","title":"Larlansz 12V Universal Power Window Switch Kit for 2-Door Cars — 3 Prewired Switches \u0026 Harnesses, Inline Fuse","description":"\u003cp\u003e\u003cstrong\u003eThis Larlansz 12V Universal Power Window Switch Kit converts a two-door vehicle from manual windows to electric operation using three pre-wired switches, harnesses and mount holders.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle never came with power windows, adding them can be done without replacing door harnesses—this kit supplies the switches and wiring needed to operate two windows from the door panels. The harnesses arrive pre-assembled so you only need to provide a switched 12V feed, a ground, and route the motor wires to each regulator or motor. It’s built for hobbyists and experienced DIYers who are comfortable with basic automotive electrical work.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I wire and test the kit before running wires through the doors?\u003c\/h3\u003e\n\n\u003cp\u003eBefore permanently routing cables, bench-test each switch and harness to confirm correct polarity and function. Use a 12V battery at the door area to energize the harness and operate a motor; this avoids repeating labor if a connection is wrong.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eConnect the kit’s positive lead (with inline fuse) to a 12V battery for the test.\u003c\/li\u003e\n  \u003cli\u003eAttach the black ground wire to battery negative and the motor leads to the window motor.\u003c\/li\u003e\n  \u003cli\u003eVerify up\/down operation and LED illumination before final installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat power source should I use so the switch LEDs don’t drain the battery?\u003c\/h3\u003e\n\n\u003cp\u003eFeed the kit from a switched 12V circuit (ignition\/key-on) rather than constant battery power to prevent the switch LEDs from staying lit when the vehicle is off. The kit includes an inline fuse on the supply lead to protect the circuit if a short occurs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eConnect the fused positive lead to an ignition-switched 12V source.\u003c\/li\u003e\n  \u003cli\u003eUse the black wire as chassis ground for reliable performance.\u003c\/li\u003e\n  \u003cli\u003eIf desired, add a relay to control power to the switches from a central fused point.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and what skills do I need for installation?\u003c\/h3\u003e\n\n\u003cp\u003eThe Larlansz kit includes three switches, a two-switch holder, a single-switch holder, and three wire harnesses tailored for two-door setups. No printed manual is included, so basic understanding of auto wiring, switch polarity and safe insulation practices is required.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncluded: 3× pre-wired switches, 1× dual switch holder, 1× single switch holder, 3× harnesses.\u003c\/li\u003e\n  \u003cli\u003eTools needed: wire crimper, multimeter, electrical tape\/heat shrink, basic hand tools.\u003c\/li\u003e\n  \u003cli\u003eRecommended: view example wiring diagrams or video walkthroughs for similar Chevy or aftermarket conversions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Larlansz 12V Universal Power Window Switch Kit is aimed at car enthusiasts, restorers and DIY mechanics converting two-door vehicles from manual to powered windows. It’s ideal if you want pre-wired controls mounted in door panels without fabricating complete new door harnesses—but it is not a plug-and-play kit for users unfamiliar with automotive electrical systems. If you’re comfortable testing with a 12V battery, making secure ground connections, and routing wires through door jambs, this kit supplies the core components to add reliable electric window control to your project vehicle.\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: Can I use this kit on any 2-door vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it’s a universal 12V kit designed for most two-door vehicles, but door motor fitment and mounting may require adapter brackets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include installation instructions?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No printed manual is included; basic auto electrical knowledge and reference wiring diagrams are recommended.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Larlansz","offers":[{"title":"Default Title","offer_id":55167313412439,"sku":"B07L162PC5","price":42.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/larlansz-front-panel-switches.jpg?v=1790382815","url":"https:\/\/britishgarage.co.uk\/products\/larlansz-12v-universal-power-window-switch-kit-for-2-door-cars-3-prewired-switches-harnesses-inline-fuse","provider":"British Garage","version":"1.0","type":"link"}