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Universal Wiring Harnesses

Manufacturer: Extreme LED Light Bars
Ships: same day if ordered before 2pm MDT (if in stock)
+ -
Availability: In stock
Choose one of the universal wiring harness and switch options below to make wiring up your new lights a snap. Comes with everything you need. Just hook up the red wire lead to the battery and the black to a ground, then plug in the light and click the switch and you're lighting up the night!

Choose the perfect harness for your setup with options to control one light, two lights, or even four lights! The brass grommets on the positive and negative terminals make connecting to the battery or accessory post a snap. Each harness comes with an inline fuse, a relay, and a switch. The switches can be easily swapped out with a rocker switch, check out our rocker switch options here.

Generally, our lights have a DT connector unless it is one of our very high-power lightbars, in which case, the listing will say it uses an ATP connector.  

We also have wiring harness extensions if you're just looking to add some extra length to your harness. If you only need a small replacement part, check out our connector parts or replacement fuses/relays.


  • DT Harness
    Relay to battery (22")

    Relay to switch (116")
    Relay to lightbar plug/s (120")
  • ATP Harness
    Relay to battery (20.5")
    Relay to switch (115")
    Relay to lightbar plug (120")
  • Dual Color Light Bar Harness
    Relay to battery (21")
    Relay to switches (95")
    Relay to lightbar plug/s (99")


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Nicely made wiring harness
Well made harness,  very reasonable price
Guest | 7/17/2024 6:05 PM
Quality product
Works perfectly
Guest | 7/17/2023 6:00 PM
I like that it is plug and play and can control two lights.
Guest | 3/15/2023 7:55 AM
A manager responded to this review
We're thrilled you are satisfied with the easy set up. We appreciate your business and hoping to see you again soon.
awesome product. awesome service. higly recommended
Guest | 8/5/2022 5:56 AM
A manager responded to this review
Awesome! We appreciate your positive feedback. Thank you for your support!
Good Service
I'm always impressed not only with Extreme LED products but also their service. I got what I need. Thanks for the help, Lorie.
Guest | 7/26/2022 8:03 AM
A manager responded to this review
We're so thrilled to know you are satisfied with our products and services. Lorie is always amazing, I'm excited to tell her about your 5 star review. Thank you!
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Laser Engraved LED Rocker Switches

These two position 12V 20 Amp rocker switches replace the factory switch on any of our wiring harnesses, allowing you to control your LED light(s) with style. These switches have 5 pins and are SPST (Single Pole Single Throw) meaning they can be integrated into dash/rocker lighting to control the illumination of the icon; the lettering is illuminated at all times. These switches are 1.75" tall and 1" wide and come in multiple laser engravings.

Wiring Extensions & Splitters

Add extra length to your LED light bar wiring harness with our wiring extensions, or use a splitter to turn 1 DT connection into 2! If buying by the foot, enter the footage needed and then hit add to cart.

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