Larlansz 12V Universal Power Window Switch Kit for 2-Door Vehicles — 3 Prewired Switches with LED Indicators & Harnesses

Larlansz 12V Universal Power Window Switch Kit converts two manual doors into powered windows using a ready-made switch and harness assembly.

If your vehicle didn’t come with power windows, this kit gives you the core electrical components to add them without buying brand-specific assemblies. It bundles three pre-wired switches, door-mounted switch holders, and three harnesses so you only need to supply a switched 12V source and a reliable ground. The switches include LED indicators, so wiring to an ignition-switched power source is recommended to avoid battery drain when the vehicle is off.

How will this kit fit into my two‑door vehicle?

The kit is made for mounting on door panels and works with most 12V systems on two‑door cars and trucks. The switch housings are universal-style so they can be trimmed or adapted into many interior panels. Because the switches arrive pre-wired, installation focuses on routing the harness and connecting power, ground, and the window motor leads.

• Includes three switches plus a two‑switch holder and a single switch holder for flexible door layouts.
• Pre-wired harnesses reduce soldering; connectors attach to your window motors.
• Designed for 12V systems—use a switched power source to protect battery life.
• Best for DIYers comfortable with basic automotive electrical work.

What tools and preparation are recommended before starting?

You’ll need basic hand tools, wire crimpers, a multimeter, and optionally a 12V bench/test battery to verify connections before final routing. Testing each switch and motor on the workbench saves time and prevents repeated door panel removal. If you don’t have factory wiring diagrams, a short online search for your vehicle’s window motor wiring or a generic Chevy power window diagram will often clarify wiring colors and functions.

• Multimeter to confirm continuity and voltage.
• 12V test battery to check switches and motor function before installation.
• Wire strippers/crimpers and quality connectors for secure splices.
• Trim tools to fit switch holders into door panels cleanly.

How do I avoid common electrical problems like constant LED drain?

The kit’s switches have built‑in LEDs that will stay lit if wired to an unswitched 12V feed. Tie the positive supply through a keyed ignition circuit or a switched accessory circuit so the LEDs operate only when the vehicle is on. Also protect the circuit with the included inline fuse and verify grounds are solid to prevent intermittent operation or noise.

• Connect the kit’s positive lead to a keyed/switched 12V source.
• Use the inline fuse supplied to protect the wiring and switches.
• Attach the black ground wire to clean chassis metal for reliable return path.
• Test with a bench battery prior to finalizing door harness routing.

What exactly comes in the package and what will I still need?

The package contains three fully wired switches, one two‑switch holder, one single‑switch holder, and three wire harnesses ready to connect to motors. You will need the window regulators and motors (if not already installed), mounting hardware for the holders, and any additional wiring to reach a switched 12V source and ground. No printed manual is included, so plan to reference wiring diagrams or online installation videos as needed.

• Included: 3 switches, 2-switch holder, 1-switch holder, 3 harnesses.
• Not included: window motors/regulators, detailed vehicle-specific instructions.
• Recommended: wiring connectors, crimps, and insulating heat-shrink or tape.
• Helpful: online vehicle wiring diagrams or YouTube installation guides.

Who this is for: Larlansz’s 12V Universal Power Window Switch Kit is aimed at experienced DIYers, custom fabricators, and classic car restorers who want a compact, pre-wired solution to add power windows to two‑door vehicles. If you’re comfortable tracing wires, testing circuits with a 12V source, and modifying door trim to accept universal switch holders, this kit supplies the electrical core to get your powered windows working without sourcing OEM switch packs.