Fuse holder with a 5A fuse on the Kingpin 12-Volt Power Supply Kit
Fuse holder with a 5A fuse on the Kingpin 12-Volt Power Supply Kit
Sleeved red and black wire on the Kingpin 12-Volt Power Supply Kit
Ring terminals on the battery end of the Kingpin Power Supply Kit
Kingpin 12-Volt Power Supply Kit in its bag
Kingpin 12-Volt Power Supply Kit: harness, fuse, ring terminals and zip ties
Power · 12V wiring

12-Volt Power Supply Kit

★★★★★ 4.8 · 16 reviews
$58.99$9.95 shipping · free over $300
  • Fused power from the battery, 25 ft
  • 5A fuse comes loaded
  • Ring terminals for the battery, bare wire for the switch
  • Tough sleeve through the engine bay, zip ties included
Finish the wiring
1
How to wire it: see the wiring guide →
$9.95 shipping · free over $300
2-year warranty
10% off military & first responders
Want it all in one click?3 F-Series 40" lights, Search Mounts, 2 Rotary Dimmers, the Power Supply Kit and cable.
$509.99 →
“Made the install easy. Love the mesh reinforcement.”Raymond R. · Verified buyer
12-Volt Power Supply Kit$58.99
25 ft
battery to bed
5A fuse
loaded
Ring
terminals
2-year
warranty
What you get

What's in the box, and what you'll need

In the box

Ready to wire

  • 25 ft 14 AWG 2-wire harness
  • Fuse holder with a 5A fuse
  • Ring terminals on the battery end
  • Zip ties
Works with

Any Kingpin switch

  • Any Kingpin switch (connects at the power end)
  • Up to 5 amps as it comes: 1 switch fully loaded is 3 A
You'll need

A few basics

  • Wire strippers and connectors
  • A Kingpin switch
Protected at the battery
Fused

Protected at the battery

Ring terminals bolt to the battery. The 5A fuse is already in the holder, good for up to 5 amps of lights.

Protected through the engine bay
Sleeved

Protected through the engine bay

A tough sleeve covers about the first 5 ft, where it runs through the engine bay. Zip ties hold it along the frame.

Protected end to end:a fuse at the battery and a tough sleeve through the engine bay.

Kingpin 12-Volt Power Supply Kit: harness, fuse, ring terminals and zip ties
The harness

Battery to bed

25 ft reaches from the battery to the bed on most trucks and SUVs. Measure your route first.

  • 14 AWG wire, thicker than the lights' leads.
  • Works in vans, trailers and boats too.
  • The fuse holder takes a standard automotive fuse.
4.8
★★★★★
16 reviews for the 12-Volt Power Supply Kit
★★★★★

“Nice and simple and just long enough for my 99 F250”

Alvin K.Verified buyer
★★★★★

“Perfect length and easy install.”

Kevin P.Verified buyer
★★★★★

“Nice Clean look...”

Casey E.Verified buyer
Turn on your tailgate
Tailgate

Turn on your tailgate

Rig gear, cook, or pack up in the dark.

Trailers & toy haulers
Towables

Trailers & toy haulers

Mount it where you load and unload.

Work zone
Work

Work zone

Relied on by forest service pros, search and rescue teams, and vehicle outfitters.

Specs

The details

Length25 ft
Wire14 AWG, 2-conductor
Fuse5A standard automotive, pre-loaded (swappable)
Battery endWeather-tight ring terminals
Far endBare wire
SleeveTough protective sleeve on about the first 5 ft, for the engine bay
IncludesZip ties
Warranty2 years from ship date
Install

How to install

  1. 1

    Plan the route from the battery to the switch. Zip-tie it along the frame.

  2. 2

    Join the bare end to the switch's power end: red to red, black to black.

  3. 3

    Last, bolt the ring terminals to the battery: red (fused) to +, black to −.

5A fuse included. Add up the amps: F-40 1.1 · F-28 0.7 · F-12 0.3 · V-40 1.4 · V-12 0.5

Full wiring guideHow many lights go on one switch, which end gets power, and real installs from customers.
Small off-road trailer at night lit by Kingpin F-Series lights
On the road

Set it up once. Use it every trip.

Wire it once and it's done.

Full product description

Easily add 5 Amps of 12-volt power up to 25 Feet from your automotive battery with the Kingpin Power Supply Kit.

This universal kit will get power to back of any size truck or SUV and works great in vans, trailers, and boats. 

Includes high quality cable and components and weather-tight ring terminals for easy connection to most standard automotive batteries.  

A standard 5 Amp automotive fuse comes pre-loaded in the fuse holder. It can be removed and resized as needed. 

The high-quality 14AWG 2-conductor wire harness is protected with a durable outer covering for the first 6FT providing ultimate protection and a clean appearance.

The included zip ties allow you to securely fasten the wires neatly along your frame or whatever.

Kingpin Pro Tip 

Since the included fuse in this harness is rated to 5A, consider your peak continuous power draw (how many lights will be on at once). Example: (1x) F-Series 40" draws 1.1Amps

Questions

Good questions, short answers

It reaches from the battery to the bed on most trucks and SUVs. Measure your route first, along the path you'll zip-tie to.

A standard automotive fuse. It comes with a 5A fuse in the holder, enough for 1 switch fully loaded (3 A). Running more lights? Size the fuse to your total amps.

Ring terminals bolt to the battery. The other end is bare wire: join it to the switch's power end, red to red, black to black.

Up to 3 amps of lights: 2× 40", 4× F-28, 8× F-12 or 6× V-12. You can mix F- and V-Series, just add up the amps: F-40 1.1, F-28 0.7, F-12 0.3, V-40 1.4, V-12 0.5.

Any 12V DC source works, like a power station's 12V outlet. Most USB ports are 5V, so they won't run the light. Some higher-power USB ports may work, but we don't recommend it.

2 years from the ship date. Send a photo or video of the install and the issue, and we'll replace it or credit you.

More wiring questions? See the full wiring guide

Pairs with

Finish the setup

Which wire do I need?Power Supply KitPower Cable
JobBattery to switchSwitch to lights, light to light
Wire14 AWG20 AWG, tinned copper
Length25 ft30 ft
Fuse5A, loadedNone
EndsRing terminals + bareBare
Price$58.99$26.99
Trusted by

Builders and outfitters

Customer Reviews

Overall rating: 4.8 / 5 from 16 reviews.

Customer photo review of 12-Volt Power Supply Kit

Fantastic light. Great installation. I can’t be any happier. The dimmable light is amazing and Red at Night could not be happier. I can now see in my cargo area. This is your go to light if you are looking for something that is well made and does what it is supposed to do. It’s on a Toyota 4Runner TRD off-road premium. Thanks a lot

12-Volt Power Supply Kit

Customer photo review of Power Supply Kit, 5A

Very ez to instill and they are definitely worth the price super bright and the quality is great

Power Supply Kit, 5A

Customer photo review of Power Supply Kit, 5A

Super easy install and absolutely perfect length!

Power Supply Kit, 5A

Store owner replied: Glad to hear! Thank you!

Harness worked well but was not long enough for my f150 so I had to add wire. I followed the exact path of other wires from the battery so a bit annoying that it’s listed as one size fits all

12-Volt Power Supply Kit

Store owner replied: Louis, please feel free to give me a call, we've never heard of this before. Curious to know how you routed it.

FANTASTIC! Def recommend as the best, and brightest lighting solution for your Truck Cap!

Power Supply Kit, 5A

Made the install easy. Love the mesh reinforcement.

Power Supply Kit, 5A

Nice and simple and just long enough for my 99 F250

Power Supply Kit, 5A

Super stoked for this harness cant wait to get it installed

Power Supply Kit, 5A

Great quality - easy to install - functions as promoted and very reasonably priced. RJ Stapell, Denver CO

Power Supply Kit, 5A

Makes install much easier.

Power Supply Kit, 5A

Store owner replied: Thank you!