40A LED Light Bar Wiring Harness – 12V Kit

40A LED Light Bar Wiring Harness – 12V Kit

Marsoni

M251S

$32.99

Get it in 3 business days with 1 day shipping. Friday, May 29

40A LED Light Bar Wiring Harness – 12V KitUpgrade your LED light bar setup with this 40A Wiring Harness Kit. Designed to handle up to 300W, it includes essential components for a reliable installation. Specifications Feature Details Wattage Capacity Up to 300W Switch Type 12V 3PIN illuminated on off Relay 12V 40A Fuse 30A blade fuse Includes a relay module box, wiring harness with adapters, and an LED light bar on off rocker switch.

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I have two of these. The number and orientation of outlets has fit all my needs. I haven't needed the USB's yet, but I'm glad they are there. The thin plug and off-center angle are very useful. One is in use under my three seat power reclining sofa, guitar multi-effects, and a couple lamps are plugged into it. The other is in a drawer powering the air pump, power filter, lighted hood and heater for the aquarium on top of the dresser it is in.

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Reviewed in the United States on November 7, 2025

Verified Purchase

Manuel Garibay

Carnegie, US

★★★★★ 5

Great item.

Size: 10ft Cord, Color: 20W_Black

It was a good item. So far, no issues. I have multiple devices connected to it.

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Reviewed in the United States on May 16, 2026

Verified Purchase

Karen

Natrona Heights, US

★★★★★ 5

Ideal - Organized and Many Plug-in Options

Size: 6ft Cord, Color: 20W_Black

Just what I was looking for at the bottom side of my bed stand to keep 5-7 cords organized and the area clean, .... clock, lamp, chargers, infarred heating pads, and other plug-ins and charger cords as needed.

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Reviewed in the United States on April 26, 2026

Verified Purchase

Jak White

Lowell, US

★★★★★ 4

Needs better hardware

Size: 6ft Cord, Color: 20W_Black

Yoooooo great product but what is with the comically tiny screws? Actually installing this on the underside of a wooden desk is near impossible unless, of course, you are in fact a Disney princess and in charge of a team of handy-dandy mice all with #0 Phillips head screwdrivers and 5/32" drill bits. They drill, you hold, kind of thing.

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Reviewed in the United States on May 11, 2026