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12 Gauge Black Primary Wire - per foot

12 Gauge Black Primary Wire - per foot

Item # 12-1-1
Our Price: $1.73
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12-1-1 - 12 Gauge Deka Wire
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Standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring. Great Prices for the best wiring from Deka. 12 Gauge Black Primary Wire - per foot part number 12-1-1 can be ordered online at or call 1-800-940-8924 for expert service.
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Deka Wiring - 12-1-1

  • Wire
  • Single Wire
  • 12 Gauge
  • Deka

Standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring.


  • This 12-gauge black standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring
  • The General Purpose Thermo-Plastic (GPT) insulation is highly resistant to acids, gasoline, oil, grease and most industrial solvents
  • Meets SAE J1128 specifications


  • Maximum power rating: 50 volts
  • Temperature rating: 176 degrees Fahrenheit

12-1-1 12 Gauge Black Primary Wire - per foot

Video of 12 Gauge Black Primary Wire - per foot

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Deka 12 Gauge Black Primary Wire Review

Today we're going to review and install the Deka 12-gauge black primary wire, part number 12-1-1. It meets the SAE J 1128 specification, has a nice thermal plastic cover, and inside are copper leads. Here we can see the nice copper strands. They're good and durable, don't break easily. After I strap back, they can be twisted together, then routed or connected as needed. Our 12-gauge wire can handle up to 50 volts and has a max temperature of 176 degrees Fahrenheit.

It has many uses. Some typical uses will be wiring on trailers, general connections or wiring repairs. Now for this application we're going to add some 12-gauge wire, slide it into the butt connector, crimp it down. We're going to go ahead and wrap it up with some black electrical tape to help keep it clean from dirt, dust, debris, and moisture. That will do it for the review and install of the Deka 12-gauge black primary wire, part number 12-1-1.

Customer Satisfaction Score:

Customer Reviews

12 Gauge Black Primary Wire - per foot - 12-1-1

Average Customer Rating:  4.9 out of 5 stars   (19 Customer Reviews)

Standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring.


I have made three recent purchases from etrailer, including marker lights, wire, interior/exterior lights. I am amazing at the great service (speedy delivery, quick answer to questions, and follow-up) and high quality products. I am impressed with this company.




All the products I have received is exactly as they are described and I have always got great support when I had questions. I am a DIY guy and have always got very understandable answers.


Followed the instructions from the Prodigy 3 kit & etrailer's web site, every thing is working great.


Use this wire to save on costs by running it down the left side of the trailer to connect my blinkers and running lights.


Product arrived as promised and everything works great. The staff at etrailer I worked with was fantastic. Thanks, Brian


Nice to have enough wire to do the job right...

Karl - 05/28/2017


shipped really fast exactly what I was looking for at a great price.



It's just wire but etrailer has awesomely fast shipping especially considering the pandemic!


Perfect size for my job.










See what our Experts say about this Deka Wiring

  • Troubleshooting Trailer Wiring Circuit that Shorts Vehicle Wiring When Connected
    You've done a great job so far tracking down where the problem is. The unfortunate part though is that there is a short somewhere on the wiring of the circuit that you just haven't been able to find. You'll need to somehow find a way to track down where it is or use new wire to bypass the old wiring and short like with part # 12-1-1 which is 12 gauge wire sold by the foot.
    view full answer...
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  • Can Wire Be Added to 7-Way Wiring To Increase Length
    Yes, you can add wire to lengthen the short wire you have on your 7-way so that it stops pulling itself out. We don't carry 16 gauge wire but we do have 12 gauge as part # 12-1-1 which is sold by the foot.
    view full answer...
  • Recommendation For Different Locations For Ground Wire
    Yes that is possible. The main concern with your ground wire is that it is solidly attached to a good ground location. Normally, one of the best and easiest places to mount your ground wire is the vehicle or trailer frame. No matter what, the ground wire needs to be firmly mounted to a clean and corrosion free metal location. Since you may need additional wire for your solution, I recommend our 12 gauge primary wire that you can purchase by the foot, Item # 12-1-1. Good luck with...
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  • Installing Aftermarket Brake Controller On 2013 Chevrolet Silverado With Factory Brake Controller
    I have attached a link to a helpful article that explains step-by-step how to install a brake controller on your 2013 Silverado with the factory brake controller installed. You do not need to do anything with the factory controller. You will install the new brake controller by hardwiring it to the wires located under the dash about where your left shin is when in the driver seat. Connect the wires as follows: GM Wire to Brake Control Wire Function Red/Black to Black Battery Power White...
    view full answer...
  • Bypassing Factory Brake Controller on 2014 Chevrolet 3500
    To bypass the factory brake controller in your 2014 Chevy Silverado 3500 you will just need to do a few things. Under the dash in your Silverado, to the left of the steering column, there should be a tow package wire bundle that is held together with a white tag. The functions for each wire should be labeled on the tag. You will find a red/black wire for the 12 volt power that will go to the brake controller black wire. Next there should be a white ground wire that will go to the white...
    view full answer...
  • Wires Get Hot and Smell Wired to 12v Battery to Power Interior Light in Enclosed Trailer
    Yes you want to ground the 12v battery to a clean bare metal surface on the trailer frame when using a spare battery to power an interior light. You want to make sure the battery is good and all of your spliced connections are connected properly. Check any of the wiring for damaged or frayed wiring. If you are using a smaller gauge wire, I recommend a 12 gauge wire like part # 12-1-1 if you are powering a lot of lights or the lights draw a lot of power.
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  • Can The Electric Trailer Brake Wiring Cross On The Rear Axle Instead Of The Front Axle?
    Yes, you can run the 12 Gauge Black Primary Wire # 12-1-1 in the manner that you have described. From the front left brake to the rear left brake, then across the rear axle to the right side rear and front brakes. The brakes will continue to operate properly in this orientation.
    view full answer...
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  • Wire Length Needed for Rewiring Old Stock Trailer
    If you have the lights and wiring already and only need additional wiring to make the connections we have the part # 10-1-1 which is 10 gauge wire sold by the foot and # 12-1-1 which is 12 gauge wire sold by the foot. We also have the junction box 7-way kit part # ET7WK that comes with a 7-way plus a junction box to wire it to.
    view full answer...
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  • Trailer Wiring Gauge Recommendation for Installing Brake Controller
    Ideally you run 10 guage like part # 10-1-1 as it's the heavier and will guarantee the circuit can carry the amperage. There are plenty of situations where 12 gauge will be fine like part # 12-1-1 but if the trailer has several sets of brake axles and the wiring ends up being longer than usual the 10 gauge provides a bit of a safety net. Basically the longer the wire the more resistance so going heavier than needed can compensate for that. As far as making the connection to the 7-way your...
    view full answer...
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  • Recommended Wire Gauge for Wiring Electric Brakes on Trailer
    For your flat bed trailer, I recommend using 12 gauge wire like # 12-1-1 at the minimum, but preferably 10 gauge wire like # 10-1-1. Both of these wires are sold by the foot, so you can order the exact length you are needing. If you were to use a thinner gauge wire than this, the 12V power needed to activate the electric brakes may be enough to overload the wires and cause them to overheat. I have attached an article on adding electric trailer brakes to a trailer that you might also find...
    view full answer...
  • Troubleshooting Radiator Fan With 12V Battery Where Wires Get Very Hot
    The wires may not be the correct gauge. They should not have been hot with 12V power. The motor may be drawing too much power as well. If the motor isn't overheating, than replacing the wires should solve the problem. You can use # 16-1-1 or # 12-1-1 depending on the amperage needs of your motor and the length of wire needed. Longer distances requires thicker gauge wire for proper amperage.
    view full answer...
  • Wire Gauge for 20 LED Trailer Clearance Lights on 150-Foot Run
    Twenty (20) individual LED clearance lights that each draw .048-amps at 12-volts will have a total current requirement of less than 1-amp. But a long 150-foot total wiring run will mean some losses. I recommend using dual runs of 10-gauge wire # 10-1-1 to ensure you get the full brightness from all those LED lights.
    view full answer...
  • Locating Wires for Electric Brake Assemblies on Used Car Hauler
    Each brake assembly on a trailer will have two wires coming out the back; a wire for ground and a wire for power. The ground wire can simply be attached to a clean, bare metal surface on the trailer frame. The power wire is what will run from the assemblies up to the front of the trailer to the 7-Way connector at the 5 o'clock position. This wire is indeed usually a 10-gauge wire with blue insulation like # 10-1-1. It's possible that the brake wire on your trailer is a 12-gauge wire instead,...
    view full answer...
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  • How To Run Backup Lights On a Trailer
    In order to run reverse lights on a trailer they will need to be powered through the trailer connector. If you have a 7-way trailer connector which is most common then there will already be a terminal for the reverse light circuit which is activated by the vehicle. This means you will need to run a wire like part # 12-1-1 from the front of the trailer to the rear but there is no way around that to my knowledge. This will then allow you to install any backup light like the Optronics FLEET...
    view full answer...
  • Why Wont OEM Brake Controller on 2008 Chevy Silverado Actuate Electric Over Hydraulic Coupler
    The IBC on your Chevy truck will not actuate electric over hydraulic brakes. You will need to install an aftermarket brake controller like the Tekonsha P-3, part # 90195. The factory installed tow package wiring is located under the dash, above the area between the emergency brake pedal and the brake pedal. Look for a bundle of 4 or 5 wires with a white tag hanging from it. The red/black tow package wire attaches to the black wire of the aftermarket controller. The white tow package...
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  • Installing an Aftermarket Trailer Brake Controller on a 2011 GMC Sierra with a Factory Brake Control
    Adding an aftermarket brake controller, like the Tekonsha P3, # 90195, to a 2011 GMC Sierra is fairly simple, even if the truck has a factory integrated brake controller. The Tekonsha P3, # 90195 is compatible with both electric and electric over hydraulic brake systems. First, you will need to locate a bundle of wires under the dash to connect the brake controller. This bundle is on the left side of the instrument panel, above the brake pedal. The wires are held together by a white tag...
    view full answer...
  • Installing an Aftermarket Brake Controller in a 2007 Chevy Silverado with Factory Controller
    On a 2007 Chevy Silverado that has the integrated brake controller, in order to get an aftermarket controller to work you will need to disconnect the blue wire that you have connected. Then you will need to attach a length of # 12-1-1 to the brake controller blue wire. Then you need to run it through the firewall, under the truck, to the 7-Way and install it in place of the wire that is already there in the 7:00 position or cut the wire coming out of that location (blue) and attach it to...
    view full answer...
  • Installation of Prodigy P3 Brake Controller # 90195 on 2011 Chevrolet Silverado With Factory ITBC
    On your 2011 Chevrolet Silverado you do not need to remove the existing red power wire for the factory brake controller from the larger silver stud in front of the under-hood fuse box. If it is removed from the power post an error code will show on the instrument panel because the vehicles computer will be looking for the factory ITBC and will not be able to find it. The Tekonsha Prodigy P3 Brake Controller, part # 90195, is an excellent choice to replace the factory-integrated trailer...
    view full answer...
  • How Does P3 Brake Controller Replace Integrated Controller of 2014 GMC 2500HD
    If you check out the attached link below you'll see all of the steps needed to install a brake controller in your 2014 GMC 2500HD with an integrated controller. The 2007(new body style)-current models have four or five blunt-cut wires under the left side of the instrument panel. These wires are located above your left shin as you are seated in the driver's seat. The wires can be identified by a white label and the color of the wires. The wire colors are (1) Red/Black wire, (1) White wire,...
    view full answer...
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  • Can P3 Brake Controller be Wired Into Factory Brake Control Harness on a 2011 Chevy Silverado
    Yes, you can use the Chevy brake controller wiring harness with the P3 # 90195 on your 2011 Chevy Silverado. On the brake controller the white wire is ground, black is 12 volt power into the controller, blue is output to the trailer brakes, and red is input from the brake switch. There isn't a plug and play option for this truck but there is a factory wire bundle under the dash which I will explain later. The wires on your factory harness should be black for ground, red for 12 volt power,...
    view full answer...
  • Using a Brake Controller on 2000 Ford Expedition With Factory 4-Flat
    Since you have the factory 4-way on your 2000 Ford Expedition, there is one other piece you will need to use your brake controller, the 4-Pole to 7-Pole and 4-Pole Adapter # 37185. You will also likely need a bit of extra wire, # 12-1-1, to install this adapter in your 2000 Expedition.
    view full answer...
  • Installing a Brake Controller on a 2013 GMC Sierra with Factory Integrated Brake Controller
    I have included a link to the help article on installing an aftermarket brake controller on a 2013 GMC Sierra that has a factory integrated controller. Basically, you will wire up the brake controller white, black, and red wires as indicated in the linked article. The blue wire though will need to be ran manually from the brake controller to the back of the 7-Way trailer connector and attached in the 7 o'clock position. For wire you can use # 12-1-1. It is sold in increments of 1 foot...
    view full answer...
  • How to Bypass Factory integrated Brake Controller on a 2014 Chevy Silverado 3500
    You certainly can bypass the factory brake controller on your 2014 Chevy Silverado 3500. If you just unplugged the factory controller it will cause an error light to display on the dash. But it is easy to bypass the factory controller and not get that warning light. First, under the dash on your Silverado, to the left of the steering column there is a tow package wire bundle held together with a white tag. The wire functions should be labeled on that tag. There should be a red/black wire...
    view full answer...
  • Recommended Replacement Brake Controller for 2014 Silverado 1500 with Factory Brake Controller
    To replace the factory integrated brake controller I recommend using the Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional # 90195, which provides you with a reliable replacement for the factory system in your 2014 Chevy Silverado 1500 and is one of the most popular units we see Chevy owners like yourself replace their factory system with. When it comes to bypassing the factory brake controller on your 2014 Chevy Silverado 1500., it can be done, but if you just...
    view full answer...

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