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Wire Loom, 3/8" Diameter, 10' Long

Wire Loom, 3/8" Diameter, 10' Long

Item # 39035
Our Price: $12.36
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Shipping Weight: 0.25 lbs
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Great Prices for the best wiring from Hopkins. Wire Loom, 3/8" Diameter, 10' Long part number 39035 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (102)
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Hopkins Wiring - 39035

  • Wiring Protection
  • Wire Loom
  • Hopkins
  • 3/8 Inch Diameter

Wire Loom

  • 3/8" Diameter
  • 10' Long

39035 Wire Conduit, 3/8" Diameter, 10' Long

Video of Wire Loom, 3/8" Diameter, 10' Long

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

Video Transcript for Review of Hopkins Wiring - Wire Loom - 39035

Jeff: Hello, everybody. This is Jeff at Today we're going to take a look at this Hopkins, 10-foot long, three- eighths-inch diameter wire loom. Now this is a split, convoluted three-eighths-inch diameter wire loom that'll easily slip over your wiring and protect it from any damage or the elements. It has a nice plastic sheathing. And if you notice it is split down the whole 10-foot length of the loom.

It has an inner-dimension of three-eights of an inch, outside dimension of a half an inch. And I just wanted to show you what you would use this for. Here's an example of a plug that would plug into a light on your trailer, and then you'll have your wiring come out of that. So if you want to protect that wiring, what you can do is just find the split portion, and then just go ahead and insert your wiring all the way into that split portion.And you could go as far as you want, you can go the whole length of wire, or you can just go part of the way and you can see once you get it in there, it'll protect the wiring, the section you need it to. And again, if you have to go more just to go ahead and pry it apart, and then just slide your wiring in there.

And again, that goes all down your wiring to protect from any damage. But that should do it for the review on this Hopkins, 10-foot long, three-eighths-inch diameter wire loom.

Customer Satisfaction Score:

Customer Reviews

Wire Loom, 3/8" Diameter, 10' Long - 39035

Average Customer Rating:  4.8 out of 5 stars   (102 Customer Reviews)


Product promptly dispatched and received, as described. Thanks, etrailer!


Everything I need etrailer has it thank you.


Restoring a 1991 2 horse trailer. etrailer had all the exact lights made by Peterson, 35 years later.


Worked perfect for my boat trailer.


What I was looking for

John M.


works for my needs


Worked for re-wiring of trailer lights.


One year ago, I installed the wire loom to contain and protect the trailer light wires on my newly restored 1969 boat trailer. They provide a professional finished look to the wiring job. They were easily installed from connector and down the frame. I would recommend and purchase again.


Everything fit well. Videos are a tremendous help!


Excellent item. I just thought the price was a little high for the guage wire you get with the harness. I definetly like the idea of not having to run wires over the top of the car. Watch the you tube video to get how to route the wires to keep them away from any moving parts. Also order 35 ft of 3/8' wire loom item # 39035 to help protect the wires. Installed this item on a 2014 Honda CR-v EX. Very east to install.


Great for organizing wires. Good quality loom with split to help make the installation easy. The split stays closed but I also periodically wrapped it along the length with cable ties and to attach it to structure to make a neat install. I keep a stash in different sizes so I always have something on hand for various wiring projects.


It worked great to cover bare wires that ran through the inside of my trailer.


I bought this to cover a 5 wire brake light harness. Wish I went a size bigger for 5 wires. Should work fine for most 4 wire harnesses. Good product. Performs as advertised


I can only really say that this wire loom does its intended job.
Keep in mind, if you intend to put more than 3 wires in it or hope to fit wire splices into it, size up to a bigger diameter.
I used a closed end socket wrench to force the wire into the split as the loom was pretty stiff


All items in the order for trailer wiring components were exactly what I ordered and all items were delivered promptly. Good communication from Etrailer with reasonable prices, and FREE SHIPPING!! Nice.


Perfect solution for protecting trailer wires.



All the products are fabulous!! Thanks for following up with me. They are in use regularly.


Used this on a trailer re-wire project to protect trailer light and brake wires. Works great.


Exactly as anticipated


What can I’s a wire loom. Does what it’s supposed to do. Seems to have held up just fine. The trailer I used it on is stored inside so I cannot speak to UV resistance.


As always Etrailer has come through. My order to completely wire my boat trailer came as promised. I've ordered several times and have always been completely satisfied. Thanks Pat


worked out well for my 4 wire harness. could have been a touch larger dia.


Seems there should be a splitter/spreader included to save your fingers but....that's just me. Good product.


Bought to use with 4 pin wiring! Oops, to small!

Etrailer Expert

Heather A.


Kip, thank you for your review. If you are looking for a larger diameter wire loom I recommend part # 459075-1. This wire look is 1/2 which is the size we normally use on our installs.This is sold by the foot, to get the length you need.


Quality loom, has not broken down yet.


I bought this item to replace some on my box trailer that was deteriorated. It seems to be good quality worked out perfectly for my application.


Shipped very quickly, good product!

Show More Reviews

See what our Experts say about this Hopkins Wiring

  • Inside and Outside Diameter of Wire Loom, 3/8" Diameter # 39035
    The inside diameter of the Wire Loom, 3/8" Diameter # 39035 is 3/8 inch and the outside diameter is 1/2 inch.
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  • Parts Needed To Replace Trailer Wiring
    When people replace wiring that is run inside a channel or frame they will attach the new wiring to the end of the wire they want to replace and pull it carefully from the other end. If you are unable to pull the wire, you can use a fish wire to try and run the wiring through the frame. This can be tough depending on the frame or channel. Another method is to run new wiring on the outside of the trailer frame. You can use a wire loom to protect the wires from being damaged. Or you cold...
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  • What is the Inside Dimension of Hopkins 3/8 Inch Wire Loom and is it Split Down One Side
    I went out to the warehouse and pulled a Hopkins Wire Loom, # 39035, to take some measurements for you. The 3/8 inch diameter is the inside diameter of the loom. And it is already split the entire 10 foot length of the loom so you would not have to fish wires through it.
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  • Tips for Routing a Power Wire from the Battery to Trunk for Trailer Wiring on a 2011 Buick Lacrosse
    There are a few methods that people use when they need to run a power wire from the vehicle battery to the rear of the vehicle. One method involves routing the wire as much as possible through the frame. What you would need to do first is determine if the frame has a hole in which a wire can be run and if there is space enough for it. You would need a long rigid and skinny object, like a coat hanger to run through the frame, tie off the wire to it, and then pull it back through. This...
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  • Recommended Wiring Junction Box For Utility Trailer
    If you are wanting to secure the wiring on your trailer and keep it secure I recommend using a wiring junction box like part # 38656 on your trailer. You can place the junction box on the tongue of your trailer and run the wires from the trailer into one side of the box and on to the terminals. Then attach the trailer connector with wires cut to the appropriate length to the matching wires on the terminals inside the box and extend it so you can attach it to your vehicle. You want...
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  • What Gauge Wire Can the 3/8 Inch Wire Loom Hold?
    3 gauge wire is about 0.229 inches in diameter, so Wire Loom 3/8" Diameter like # 39035 will give it enough space for safety without further restricting the wire for heat dispersion. It will also avoid pinching or crimping the wire. You can use the Metal Loom Clamp - 1/2" # A0500 to secure it if desired. Technically this loom could hold up to 00 gauge wire (0.365 inches diameter).
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  • Is Wiring Conduit a Good Idea When Running Wiring of Roof Vent Fan Through Ceiling
    The flexible plastic tube you are referring to is known as wiring conduit and is a really smart idea to protect wiring. Especially if the wiring will be difficult to access once the trailer is put together like what you are doing. I'd recommend using some 3/8 inch diameter conduit like the part # 39035 when running the wiring just as an insurance policy to keep the wiring more protected.
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  • Does Power Wire of Curt 4-Way C56434 Come with Wire Loom
    Hey Brendon, the power wire of the Curt 4-Way part # C56434 that you referenced does not come with a wire loom but we do have some that you could add separately with the part # 39035 for a 10 foot long section.
    view full answer...
  • Wire Loom Clamp To Use with Wire Loom, 3/8" Diameter 39035
    The outer diameter of the 3/8 inch inner diameter wire loom part # 39035 that you referenced is 1/2 inch. So for clamps you'd want the 1/2 inch clamps part # A0500.
    view full answer...
  • What Size Clamp to Use for 3/8" and 1/2" Size Wire Loom
    You should be able to use the same size clip as the inner diameter of the wire loom. For example, the 3/8" Diameter Wire Loom # 39035 has grooves in it that would allow you to use a 3/8" inner diameter clamp. Same thing goes for the 1/2" Wire Loom # 459075-1 or # 459075.
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  • Can the Wiring Harness In Diode Wiring Kit # RM-154 be Routed Through the Frame on 2010 Honda CR-V
    It is possible to route the wiring in the Roadmaster Universal Hy-Power Diode Wiring Kit, # RM-154, through the frame of your 2010 Honda CR-V if the frame rails are hollow all the way through (front to rear) and if there is easy access to the frame rail from the front to the back of the vehicle. I have included a video below. Our installer in the video does pull the harness through the frame rail using a wire pull similar. He first routes it through the back of the frame and the wire...
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  • Wiring Routing For Hopkins Backup Sendor System On 2014 Nissan Murano
    Since there are so many vehicles the Hopkins Backup Sensor System, part # HM60100VA, we can make suggestions for running the wires but we do not have them for each vehicle. When running the wires to the front you want to make sure you avoid any moving parts, sharp edges, or hot areas like the exhaust. Many people use wire loom like part # 39035. This is a 3/8 inch loom that measures 10 ft long. It will protect the wires for the sensor when installing. If you can find an opening, you...
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  • Compatibility Of 1/2 Inch Loom Clamps With 3/8 Inch Loom
    Yes, you can use Metal Loom Clamp - 1/2" # A0500 with Wire Loom 3/8" Diameter # 39035. It will secure the loom to your frame but it will not clamp tightly around it. If you want a tight fit at the clamps you can use 3/4" x 60' Electrical Tape to close the loom at that location and make it your desired thickness for clamping. If you want a perfect fit, I recommend the Wire Loom, 1/2" Diameter (per Foot) # 459075-1.
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  • What 2022 Ford Maverick Battery Should Curt T-Connector 12V Power Be Connected To
    You need to route the 12V power wire from the Curt T-Connector Vehicle Wiring Harness with # C59DR up to the battery under the hood of your 2022 Ford Maverick, which we demonstrate how to do in the linked installation video. I also recommend picking up the Wire Loom # 39035 and Mounting Bracket # 18144 to complete the installation.
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  • What is the Best Size Wire Loom for Bonded 4 Wire and One 12 Gauge Wire
    I would go with a 3/8 inch diameter, like # 39035. That should provide enough space for the wires and still give good coverage. This loom comes in a 10 foot length. If you needed less of expect that you might have other wiring to run with the existing wires, you can go to a 1/2 inch loom, sold in 1 foot increments, # 459075-1.
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  • InvisiBrake Flat Tow Setup 2006 Jeep Wrangler
    Part # RM-8700 is a confirmed fit for your 2006 Jeep Wrangler. The InvisiBrake system works with RV's that have air or electric brakes. The InvisiBrake system builds pressure using your vehicles factory brake booster. The InvisiBrake system gets spliced into the diode wiring to tell the system when to turn on. This kit doesn't have an on/off switch, when the diode wiring is plugged into the towing vehicle, it sends the signal to the towed vehicle telling the InvisiBrake when to apply the...
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  • Hitch & Wiring for 2017 Toyota Sienna Towing Boat Trailer
    All versions of the 2017 Toyota Sienna have a towing capacity of 3500-lbs so your new vehicle is up to towing your 3000-lb boat and trailer. Do note that all auto makers recommend not towing anything for the first few hundred miles on the car to allow for proper break-in without putting extra stress on the vehicle. Draw-Tite Class III hitch # 75237 is an excellent choice since it offers a 4500-lb capacity, providing a healthy safety margin. For a wiring harness part # 118498 is a fine...
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  • Recommended Way To Protect Wires On Trailer Wiring Harness
    The only sort of protection we offer for wire leads such as those on the 25 Ft 5-Way Trailer Wiring Harness part # A25W5B would be wire loom, the 3/8" Diameter Wire Loom part # 39035. This can be used to cover the length of wire on the tongue or anywhere else for that matter to help protect from rodents.
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  • Recommend Vehicle Side 7-Way Connector with Wiring Protection
    The 7-Way Super Sealed Connector w/7' Cable - Car End # 50-87-007 is a great cable but you are correct that you would need about 6 inches behind the connector for a hard turn in the cable. For your application, I recommend the 5th Wheel and Gooseneck7-Way Pre-Wired Car Connector, 7' Lead # 20023. If you don't need as long a connector, you can use the Hopkins Endurance Quick-Install 7-Way Trailer Connector with Universal Pigtail Harness - Vehicle End # HM47210 which is the factory style...
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  • Product to Protect Trailer Wiring on 2007 Suzuki Grand Vitara
    It is a great idea to provide some protection for your trailer wiring on your 2007 Suzuki Grand Vitara and we do offer a product just for this purpose. Wire loom is offered in 10-foot lengths in both 1/4-inch diameter (part # 7509-10) and 3/8-inch diameter (part # 39035) and also in 1/2-inch size by the foot, part # 459075-1. The linked video shows an application of this product. Wire loom is a great idea in general, but especially in cold climates where winter time road salts can attack...
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  • Trailer Wiring Harness and Bracket for 2022 Toyota RAV4 with Curt Hitch
    All of the parts would work great on your 2022 Toyota RAV4 with the Curt hitch part # C13416 that you have installed. The Curt harness part # C56434 is confirmed as a fit for your vehicle. You could use the 3/8 inch wire loom # 39035 to keep it protected, use the part # 18144 with the # 18136 to mount it to your hitch tube, and then use the tester # I26 as well to know it works.
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  • Availability of Jacketed Wishbone 4-Pole Trailer Wiring Harness
    We do offer 4-pole wishbone wiring harnesses like # A35W42B and jacketed 4-pole wire such as # DW04923-1. We do not have a jacketed wishbone 4-pole trailer harness but you can certainly provide protection to a 4-pole wishbone harness - and keep the ability to run the separate running light wires to each side of the trailer - by using wire loom like # 39035 which is sold in 10-foot lengths.
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  • Troubleshooting Trailer Tail Light That Stays On With Trailer Uncoupled and Wiring Disconnected
    Since your trailer lights are getting some power even when the trailer is not hitched and not connected to the tow vehicle wiring this tell us that one of the batteries on the trailer, either the auxiliary battery for the lights or the breakaway battery for the trailer's electric brakes, is somehow leaking power to the lights. Most likely there is a short on the power leads to one (or possibly even both) of the trailer batteries. You can inspect all of the breakaway and auxiliary batteries'...
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  • Availability of 7-1/2 Inch Oval Trailer Taillights With Separate Brake Lamp and Turn Signal Circuits
    We don't offer a 7-1/2 inch oval taillight that's compatible with a 'separate' taillight system. Everything we offer is designed for a typical combined system that carries the brake lamp and turn signal on the same circuit. It could be possible to wire the # STL211XRFHB as a separate system, but the turn signal indicator would be white light which would get you in trouble with the DOT or law enforcement, so I wouldn't recommend doing that. I wouldn't give up on the taillight converter....
    view full answer...

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Employee Jeff D
Installed by:
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