--- product_id: 9272415 title: "Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar …" brand: "quandingyi" price: "116.60 DT" currency: TND in_stock: true reviews_count: 5 url: https://www.desertcart.tn/products/9272415-quandingyi-universal-wiring-harness-12v-40a-power-relay-blade-fuse store_origin: TN region: Tunisia --- # 12V Power 40A Relay Waterproof Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … **Brand:** quandingyi **Price:** 116.60 DT **Availability:** ✅ In Stock ## Summary > Illuminate Your Adventure! 🌟 ## Quick Answers - **What is this?** Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … by quandingyi - **How much does it cost?** 116.60 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/9272415-quandingyi-universal-wiring-harness-12v-40a-power-relay-blade-fuse) ## Best For - quandingyi enthusiasts ## Why This Product - Trusted quandingyi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Extended Reach:** 2.5m wire for flexible light placement. - • **Complete Wiring Kit:** Includes everything you need for a hassle-free install. - • **Durable Construction:** High-quality copper and silicon-infused wire. - • **Universal Compatibility:** Seamlessly fits all 10-30V DC vehicles. - • **User-Friendly Installation:** Simple setup with support available. ## Overview The Quandingyi Universal Wiring Harness is a versatile and durable solution for powering your off-road LED work lights. With a 12V 40A power relay and a waterproof design, this wiring kit ensures reliable performance in any environment. Its 2.5m wire length allows for flexible installation, making it compatible with a wide range of vehicles and devices. ## Description QDY wiring harness for LED off road lights is the perfect accessory for off road vehicles, working vehicles, and any automobile that could use a relay to power specific equipment. Consisting of a relay, an illuminated on/off switch, and more than 8 feet's of wiring, this wiring harness for LED off road lights simplifies the installation process of powering various equipment on all automobiles. Interchangeable/Compatible with: All automobiles and devices equipped with a 10 to 30 Volt DC power source. Features: 1. Illuminated on/off switch 2. Power Relay 3. Blade Fuse 4. More than 12ft of wire 5. 2 sets of power connectors to light fixtures Product Content: 1x Wiring Harness Full Wiring Kit for All Light Bars with WATERPROOF ON/ OFF switch for 7", 10", 13", 20", 30", 40", 50" Installations: 1. connect the red+ wire from the fuse to battery +; connect the black wire from the relay to the battery; 2. connect the wire for lights bar from the relay; (red/black correspond to the wire of lights bar); 3. connect the white +/black- wire of the switch to battery or any place of your car system to get power for the switch; 4. turn on on/off button of switch to test the lights bar. CAUTION: All exposed metal of harness must be covered with electrical insulation tape or it may get short circuit! ## Features - Universal! Compatible with all automobiles and devices equipped with a 10-30 Volt DC power source - LONGER! 2.5m wire from battery to light fixture. You mount lights anywhere you want - Durable! Made of high quality Copper, silicon infused wire, durable and Waterproof - Easy! Very easy to install, if you don't how to mount it, please feel free to contact us. - Packing wiring kit includes 12ft wire, led power ON/OFF switch, power relay, blade fuse ## Images ![Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … - Image 1](https://m.media-amazon.com/images/I/61JjhYPbyML.jpg) ![Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … - Image 2](https://m.media-amazon.com/images/I/61TNiOz+yAL.jpg) ![Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … - Image 3](https://m.media-amazon.com/images/I/61l3ZKh5b+L.jpg) ![Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … - Image 4](https://m.media-amazon.com/images/I/617GijhXjTL.jpg) ![Quandingyi Universal Wiring Harness 12V 40A Power Relay Blade Fuse ON/Off Switch for Off Road LED Work Light Bar … - Image 5](https://m.media-amazon.com/images/I/41lRmeN93ZL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best Harness I Have Found So Far *by C***4 on Reviewed in the United States on May 15, 2014* I am a home 4x4 rebuilder as a hobby to help me destress and found myself doing this for my teenagers who where just starting to drive. I have used harnesses that come with high end lighting systems from PIAA, KC, Rigind Industires, and some more no name brands. These by far are the best I have purchased to date and for the price it is a great buy.PRO's:- Gauge of wire throughout. Looked like 16 guage mostly and maybe 18 or 20 for the switched connections. (larger than most of your others who run the smallest they can to support products depending on length of wire. This will handle any light out there, not just LEDs.- Duetch (weatherproof) connector attached and one for your device (Huge convenience and costly add on)- Rocker Switch versus cheep push button style (even though I use OTTRAW swithches)- Vinly Loom along entire line- Quality Relay- In line fuse with the ATO fuse- Terminal boots on the switch connectors. (Seems small, but shows the attention to detail and the sellers understanding of it all)- Doesn't double, triple S/H if you buy more than one- Quich ship and receipt- Overall price of the wiring harness (Fantastic for this level of quality)CONs:- Only one I can think of, offer with PRIME shippingLike I said above, this is one of many harnesses I have used and I bought two at first. Wish I would have purchased all he had left at the time. GREAT HARNESS. Get more out here (with Deutch) on Amazon soon PLEASE so I can buy a few more. Also I found your double end (two leg) version and I will buy a few of those as well.Thank you for putting together a high quality product that was at least assembled in the USA. (And you can tell) ### ⭐⭐⭐ I have far better relays. The one that comes with this is ... *by B***K on Reviewed in the United States on December 31, 2016* So I'm a EE, and I knew what I was getting here.And it meet my expectations, cheap fuse holder, cheap relay that failed after a couple of cycles.But I really wanted the switch and the harness, which I only had to modify some length of wires a bit for the size of my truck.I have far better relays.The one that comes with this is not a standard Bosch layout, so had to cut in my own socket to go to a new relay.BE WARNED, if your not use to wiring, the instructions have a bad flaw... they show wiring the RED wire from the switch straight to the battery, and even give you a slotted ring lug for this, as they do on the fuse holder... and that other fuse holder should be the first hint.You never wire directly to the battery w/o going to a fuse as soon as possible.That RED wire from the switch needs a fuse if you wire it directly to the battery, and don't be tempted to wire it to the existing one in the harness, that one is too big for the gauge wire to the switch.I added a 5amp fuse and water tight fuse holder (and used my own water tight fuse holder with a 20amp fuse for the power lead from the battery to the relay, that powers the lights).OR, you can take that RED wire from the switch, and cut off the lug and tap into an ACCESSORY switched circuit that is fused and turns on/off with the key.The connector from the harness to the switch is nice enough, and should be in the car, not under the hood.I took a photo of the harness end of the connector, removed the pins, so I could easily pass them through the grommet in the firewall, and put the pins back into the connector shell once in the cab of the truck, and than connected the harness to the switch.I really just wanted the switch and harness and hoped for the best with the relay and switch.Relay failed, switch is working well. ### ⭐⭐⭐⭐⭐ Amazing Light *by A***C on Reviewed in the United States on October 24, 2013* By reading the other reviews I thought I would get some kind of wiring harness with the light, maybe a relay, a switch, or a fuse holder. The light has about 18" of rubber sheathed wire sticking out it's back, one red wire (+), and one black wire (-) protrude from sheathing. The little parts bag contained: 6 cap screws, 2 nuts, 2 rubber pads (for the feet), and 2 Allen wrenches. 2 mounting brackets (feet) are also provided (and they can be mounted with the feet pointing inward or outward). No other wiring was included. No paper work of any kind was in the box. I am an experienced mechanic so the install went smoothly, but if installation instructions were provided I think they would be of help to some buyer's. I installed the light thru a relay so it comes on with the high beams (thru a 10 amp fuse). The light is very bright and has a good range, now when I switch off the high beams (LED light goes off too) it is such a drastic change in lighting that it seems like all of my front lights just went out. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/9272415-quandingyi-universal-wiring-harness-12v-40a-power-relay-blade-fuse](https://www.desertcart.tn/products/9272415-quandingyi-universal-wiring-harness-12v-40a-power-relay-blade-fuse) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-16*