Larlansz 12V Universal Power Window Switch Kit for 2-Door Cars — 3 Prewired Switches & Harnesses, Inline Fuse

This 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.

If 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.

How do I wire and test the kit before running wires through the doors?

Before 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.

• Connect the kit’s positive lead (with inline fuse) to a 12V battery for the test.
• Attach the black ground wire to battery negative and the motor leads to the window motor.
• Verify up/down operation and LED illumination before final installation.

What power source should I use so the switch LEDs don’t drain the battery?

Feed 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.

• Connect the fused positive lead to an ignition-switched 12V source.
• Use the black wire as chassis ground for reliable performance.
• If desired, add a relay to control power to the switches from a central fused point.

What comes in the package and what skills do I need for installation?

The 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.

• Included: 3× pre-wired switches, 1× dual switch holder, 1× single switch holder, 3× harnesses.
• Tools needed: wire crimper, multimeter, electrical tape/heat shrink, basic hand tools.
• Recommended: view example wiring diagrams or video walkthroughs for similar Chevy or aftermarket conversions.

Who 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.