bing tracking image
  1. Wiring
  2. Hopkins
  3. Tools for Wiring
  4. Wiring Kits
  5. Installation Kit
Hopkins Trailing Wiring Installation Kit with Circuit Tester and 4-Way Flat Dust Cover

Hopkins Trailing Wiring Installation Kit with Circuit Tester and 4-Way Flat Dust Cover

Item # HM51000
lowest price pledge
Our Price: $12.05
You Save: 53%
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.38 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
Ideal for rewiring a trailer, this kit contains a 6-12-V LED circuit tester, connectors, ring terminals, zip-ties, ground screws, and more. Lowest Prices for the best wiring from Hopkins. Hopkins Trailing Wiring Installation Kit with Circuit Tester and 4-Way Flat Dust Cover part number HM51000 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (4)
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

Hopkins Wiring - HM51000

  • Tools for Wiring
  • Wiring Kits
  • Installation Kit
  • Hopkins

Ideal for rewiring a trailer, this kit contains a 6-12-V LED circuit tester, connectors, ring terminals, zip-ties, ground screws, and more.


  • Trailer wiring installation kit is ideal for Y-harness and 4-conductor wire installation
  • Includes the basics for rewiring or hardwiring a trailer connector to your trailer
    • (1) 6-12-V LED probe circuit tester
    • 1 Roll of electrical tape
    • 9 Butt connectors
    • 1 Terminal grease packet
    • 2 Self-tapping, hex-head ground screws
    • (20) 5-1/2" Long zip-ties
    • (1) 4-Wire flat dust cover
    • 4 Splice connectors
    • 3 Ring terminals
    • 1 Resealable storage case to keep everything organized

51000 Hopkins Trailer Rewiring Kit with 4-Pole Flat Dust Cover and Circuir Tester

Video of Hopkins Trailing Wiring Installation Kit with Circuit Tester and 4-Way Flat Dust Cover

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

Video Transcript for Hopkins Trailing Wiring Kit Installation

Today we're going to be taking a look at and showing you how to use the Hopkins Trailer Wiring Solution Kit with Circuit Tester. Part number HM51000. It comes with this nice reclosable case that you can keep in your glove box, so if you ever go out to the lake and your lights didn't work you'd have a way to test them and repair them. It's going to come with this nice LED test light. It will work for low voltage and for regular 12 volt power. It has some electrical tape, it will have a couple of ring loop terminals of various sizes, and a couple of self tapping screws if we had to replace a ground wire. It also has some quick connects.

A little bit of dialectric 00:00:44 grease if you we're having to change out a bulb, you'd want to put some of that on the socket so you keep all of your corrosion and rust out of there. You'll have a new cover for your four flat connector, and some zip ties. This would be a great thing to keep either in your boat or in your truck in the glove box, so if you ever have a wiring problem and you're on the road, you can just pull this out and repair it. Now you can see we're testing our lights on our trailer. We've got one that's out with our power on. We're going to take our test light that's included with our kit.

We're going to find a suitable ground and we're going to take our LED tester. We'll check our wire. This one's got power, so that's going to be our power wire. We're going to turn off the power, and we can go ahead and connect up our wire. I'm going to go ahead and strip back our wiring about a quarter inch. We're going to take one of our blue butt 00:01:38 connectors that came with our kit.

Place it in there. We're going to give it a nice crimp. You want to get a nice set of crimpers. That way you don't over crimp or under crimp your connection. We'll slide it in the other side.

Now we can tape up that connection, and we'll go after our ground. We want to tape it up to keep all the moisture and corrosion out of our connection. We know this other wire is going to be our ground, so we're going to go ahead and connect them back together. Strip it back as well. Take our other blue butt connector, slide it into position, give it a little bit of a tug. Make sure it's connected good. You always want to make sure you have the proper crimp, so you don't have the wires fall out. If you over crimp it you can break the wires inside our connector. We're going to go ahead and put our electrical tape on our ground wire here. Then we're going to test our system to make sure our light works. We know we have power. If it's not working, more than likely, it's going to be a bad bulb. We'll go ahead and test it. Tuck our wires back away. That took care of our wiring repair rather painlessly, with the help of our new Hopkins kit. That's going to do it for our look at the Hopkins Trailer Wiring Installation Kit with Circuit Tester. Part number HM51000.

Customer Reviews

Hopkins Trailing Wiring Installation Kit with Circuit Tester and 4-Way Flat Dust Cover - HM51000

Average Customer Rating:  4.3 out of 5 stars   (4 Customer Reviews)

Ideal for rewiring a trailer, this kit contains a 6-12-V LED circuit tester, connectors, ring terminals, zip-ties, ground screws, and more.


Very useful collection of parts.


Great product




Ask the Experts about this Hopkins Wiring

  • Wiring Kit Needed like the # ETBC7 Without the Connector and Mounting Bracket
    We have a combination of a few kits that will get you the parts you are talking about, but we do not have a kit like the Universal Wiring Kit # ETBC7 without the connector and mounting bracket. If you purchase the Hopkins Trailing Wiring Installation Kit # HM51000 it will give you butt connectors, some quick splices, ring terminals, and a circuit tester. If you then get the Draw-Tite Wiring Kit for 2, 4, 6, and 8 Brake Electric Trailer Brake Controllers # 5506 you will then have the circuit...
    view full answer...
  • What is the Correct Wiring Needed to Re-Do Lighting on Trailer?
    The correct kit for your Shoreland'r PWC trailer is going to depend on its width. If it is over 80 inches wide, you will want the Submersible, Over 80-Inch Trailer Light Kit, # TLL36RK. If the trailer is less than 80 inches wide, you will want to go with the Submersible, Under 80-Inch Trailer Light Kit, # TL5RK. Each kit is going to come with tail lights, side marker and clearance lights, a wiring harness with 4-way connector as well as the mounting hardware. To make things easier on yourself,...
    view full answer...
  • Recommended Trailer Brake Controller and Wiring for 2004 Nissan Frontier
    Starting with the brake controller itself, I highly recommend the Tekonsha Prodigy P2 # 90885. This is an excellent, proportional controller that will activate your trailer's brakes at the same time and with the same intensity that you apply to them in your Frontier. The unit features an easy-to-read digital display and continuous diagnostics that will alert you to potential issues. We do have a combination of a couple kits that will give you everything included with the # ETBC7 Universal...
    view full answer...

Do you have a question about this Wiring?

  • Why

    At we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Joshua S
Video by:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Written by:
Laura H
Employee Cole B
Installed by:
Cole B
Employee Andrew S
Installed by:
Andrew S

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.