1. Wiring
  2. Custer
  3. Wiring Adapters
  4. Single-Function Adapter
  5. 7 Round
  6. Plug and Lead
Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round

Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round

Item # KIT-7P-4
lowest price pledge
Our Price: $53.92
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 1.11 lbs
Quantity: 
Wiring KIT-7P-4 - Plug and Lead - Custer
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

Convert a 4-way flat trailer connector to a 7-way round connector with this adapter. The pigtail harness hardwires into your vehicle's existing wiring. Built-in ABS plastic cover protects the 7-way terminal from dust and moisture. Lowest Prices for the best wiring from Custer. Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round part number KIT-7P-4 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (2)
  • Q & A (6)
  • Photos
  • Why etrailer?

Custer Wiring - KIT-7P-4

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Round
  • Plug and Lead
  • Custer
  • 0 - 5 Feet Long
  • 4 Flat

Convert a 4-way flat trailer connector to a 7-way round connector with this adapter. The pigtail harness hardwires into your vehicle's existing wiring. Built-in ABS plastic cover protects the 7-way terminal from dust and moisture.


Features:

  • Adapter converts your vehicle's 4-way flat trailer connector to a 7-way round connector
  • Pigtail harness hardwires to existing wiring for brakes, power, and accessory
  • Built-in cover protects the 7-way end from dirt and moisture when not in use
    • Hinged cover opens 180 degrees for effortless connection
  • Pull grips make 7-way plug easy to install and remove
  • ABS plastic construction is strong and durable
  • Flexible wire between plugs provides wide range of motion
  • Length: 18"


KIT-7P-4 Custer Prewired Trailer Connector Adapter w/ Dust Cover - 4-Way Flat to 7-Way Round






Customer Reviews

Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round - KIT-7P-4

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Convert a 4-way flat trailer connector to a 7-way round connector with this adapter. The pigtail harness hardwires into your vehicle's existing wiring. Built-in ABS plastic cover protects the 7-way terminal from dust and moisture.

- KIT-7P-4
by:

Thank you so much for taking the time to help me. I've been driving my trailer for a month. You're company was the only one who could help me find a converter for my classic trailer. Thank you again



- KIT-7P-4
by:

the product was a pig tail wire to convert a 4 pin trailer plug to a 7 pin. it far exceeded my expectations and took a load off of my mind about wiring my new pickup.


2
2

Ask the Experts about this Custer Wiring

  • Adapter for 4-Flat on Vehicle to Attach to 7-Way Round on Trailer
    Thank you for the photos they were very helpful. What you have on your vehicle is a 4-way flat, and on your trailer you have a 7-way round, which is less common than a 7-way blade-style, but there is still an option for you to connect the two. The correct part adapter for this is the Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round # KIT-7P-4. If you just want to use it for your the same functions as your 4-way - the turn signals and tail lights - you only need to plug...
    view full answer...
    Image 1 for Image 2 for
  • Is There a 4 Round to 7 Round Adapter
    We have a possible solution for you but there is no such thing as a 4-round to 7-round adapter; you would need to make your own. What you could do is use the Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round # KIT-7P-4, cut off the 4-way flat and wire in the RoadMaster 4-Wire Connector # RM-910030-2.
    view full answer...
  • Availability Of Short 4-way to 7-way Adapter
    The closest thing we have to a molded 4-way flat to 7-way blade adapter is the Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round # KIT-7P-4 which has the 4-way connector to plug into the 4-way on your vehicle and give you the 7-way blade connector you are looking for. If you are just needing the lighting functions of the 7-way then you will not need to use the 3 additional wires. If your trailer has trailer brakes, or has a battery and you need 12v power in the connector you...
    view full answer...
  • Adapter to Connect 4-Way on Vehicle to 7-Round on Trailer
    We have exactly what you need, an adapter that converts your vehicle's 4-way flat to a 7-way round connector, which is the following: - Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round # KIT-7P-4 This is the same as the part number you mentioned, but with a 7-round as opposed to the 7-blade so it'll be perfect for your needs, giving you the functionality of your vehicle's 4-way while connected to your trailer's 7-way.
    view full answer...
  • Adapter to Go From Tow Vehicle 4-Way to Trailer 7-Way
    To go from the 4-way of your tow vehicle to the 7-way of your trailer you'd the 4-way round connector part # KIT-7P-4 with the 7-way socket # HM48480 and you'd need to wire them together.
    view full answer...
  • 2015 Ford Transit T-350 Van Trailer Connector not Working What Should I check
    From what I understand your 2015 Ford Trasit T-350 has a connector on the back for use with trailers that looks similar to the Custer Trailer Connector part # KIT-7P-4 and you have added an adapter similar to 7-Way Round Pin to 4-Flat Adapter part # 118709 to plug your 4-way flat trailer plug into and you are getting no power to the lights at all. This sounds like a pretty common issue we run into often. That being the ground wire. This could have been damaged or has corroded at the...
    view full answer...

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com 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 Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Rachelle B
Written by:
Rachelle B
Employee Sarah W
Updated by:
Sarah W
Employee Brian T
Updated by:
Brian T

At etrailer.com 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.