bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Optronics
  3. 7 Blade to 5 Flat
  4. Universal Fit
  5. Wiring Adapters
  6. Plug and Lead
7-Pole Blade to 5-Pin Delphi Connector Wired Trailer Adapter with 2-Pin Backup Camera Plug - Coiled
etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Optronics

7-Pole Blade to 5-Pin Delphi Connector Wired Trailer Adapter with 2-Pin Backup Camera Plug - Coiled

Part Number: OPT42ER
In Stock
$96.60
Custom Fit Vehicle Wiring
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

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

Customer Photos

etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Trailer adapter converts a tow vehicle's 7-pole wiring connection to a 5-pin Delphi connection and a 2-pin camera connection for towing trailers with a backup camera. Coiled cord for extra flexibility. Threaded bracket for a secure connection. 1-800-940-8924 to order Optronics custom fit vehicle wiring part number OPT42ER or order online at etrailer.com. Free expert support on all Optronics products. Great prices and Fastest Shipping for 7-Pole Blade to 5-Pin Delphi Connector Wired Trailer Adapter with 2-Pin Backup Camera Plug - Coiled. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (18)
  • Q & A (0)
  • Videos (2)
  • Photos

Optronics Custom Fit Vehicle Wiring - OPT42ER

Highlights

  • Connects Different Plugs: Links a 7-way blade to a 5-pin Delphi trailer connector.
  • Backup Cam Ready: Built-in 2-pin plug powers and connects your trailer’s backup camera.
  • Tangle-Free Reach: Coiled cable stretches up to 94-1/2" for flexible hookup and clean routing.
  • Easy Pass-Through: Strain relief is 3-1/4" long and fits through a 3/4" hole for neat installs.
  • Single-Option Design: Includes backup camera lead—model not offered without this feature.

Features to know about

Keeps Trailer and Camera Connections Organized: 7-Pole to 5-Pin Delphi Adapter

When you’re setting up a trailer with extra wiring needs, this adapter keeps things simple. It converts a standard 7-pole blade connection to a 5-pin Delphi plug and includes a built-in 2-pin plug for a backup camera. Everything stays cleanly connected without needing extra cords or splices.

Tidy Setup That Extends When You Need It: Coiled 94-1/2" Cable

Instead of dealing with slack wire dragging on the ground, this coiled cable stretches up to 94-1/2". It stays compact when parked or disconnected, then extends smoothly to reach your trailer when it’s time to tow. The coil design keeps things neat and out of the way.

Built for a Clean Pass-Through: Compact Strain Relief Design

The strain relief at the connector measures about 3-1/4" long and passes cleanly through a 3/4" hole. That makes routing through panels or junction boxes easier and keeps the wiring protected from pull or twist.

All-in-One Adapter for Power and Video Signals

With both trailer lighting and camera leads built into one harness, there’s no need to run separate lines. The Optronics design ties together the essentials—power, lighting, and backup view—into one simple plug-and-lead setup for quick hookups every time.

Specs

Dimensions

  • Strain relief length: approximately 3-1/4"
  • Hole size required for strain relief: 3/4"
  • Total coiled cable length (stretched): 94-1/2"

A57CCMCDB Optronics 7 Way Blade to 5 Pin Delphi with 2 Pin Reverse Camera Connector Wired Trailer Connection Adapter for Campers and Boat Trailers with Backup Cameras - Coiled Cable





Video of 7-Pole Blade to 5-Pin Delphi Connector Wired Trailer Adapter with 2-Pin Backup Camera Plug - Coiled
Video Thumbnail Video Player Dialog

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




Video Transcript for Review of Optronics Trailer Wiring - 7-Pole Blade to 5-Pin Delphi Coiled Connector - OPT42ER

Hi there, I'm Michael with etrailer.com. Today we're gonna take a quick look at this seven pole blade to five pin delphi connector. This is going to convert a tow vehicle's seven pole wiring connection, to a five pin delphi trailer connection, with the two pin camera connection, so that you can see your camera when you're towing a trailer with a backup camera. So you'll be able to monitor that feed. This does have a grip handle on the seven way plug for an easy connection and disconnection, easily pull it out, gives you plenty of grip there. You can see this does have the coiled cord that's gonna stretch and contract to prevent unnecessary stress on the wires.

It's gonna keep it up off the ground but still give you plenty of length so that you can run through. It does have this threaded mounting bracket, that's gonna ensure secure connection to the vehicle there. You can see it also comes with this mount, that's gonna make it very simple to keep your plug up off the ground when it's not in use. You just store it there, once you have this mounted in place. So if you are looking for a cable that's going to convert your tow vehicles seven pole wiring connection to that five pin, delphi trailer connection, the two pin camera connection, this is gonna be exactly what you need.

That completes our look for today. Again, I'm Michael with etrailer.com. Thanks for watching..

Customer Satisfaction Score:

Ratings & Reviews

4.6

18 reviews
Review sort icon
Trailer adapter converts a tow vehicle's 7-pole wiring connection to a 5-pin Delphi connection and a 2-pin camera connection for towing trailers with a backup camera. Coiled cord for extra flexibility. Threaded bracket for a secure connection.

by:



by:



by:



by:



by:



by:



by:



by:



by:

good price and exactly what I needed.



by:

Great quality



by:

cant say enough good things about my experience
from
ease of shopping to fast delivery
i will definitely be back next time
you folks are the best!



by:

Good communication. Only place I could find this specific hook up



by:

Product came well packed and exactly as described. I have not installed yet, but I do t anticipate any issues.



by:

Always have what I need at a reasonable price and quick delivery.



by:

The 7-way replacement cable fits great, and it arrived just in time. Thanks!



by:

Plug head is too small forn7-pin connector. The weight of the coil is causing wabble and loose connections.

Lazer S. profile picture
Etrailer Expert

Lazer S.

9/9/2025

This is the first time I have heard of this happening. The flap/cover on the vehicle's 7-way should keep the plug securely in place, but if it isn't, that would definitely be an issue. Is the 7-way on your vehicle a factory 7-way or aftermarket? If factory, what is the year, make, and model of said vehicle? If aftermarket, do you know what brand it is and how old it is?



by:

Awesome customer service



by:

This replacement is much improved, with thicker wiring and sheath. So then is a bit larger and had to adjust to install. But works perfectly...and hopefully will.not have the issue of the rubber sheath peeling off the wires. I included a photo of the installation with the original pictured. I had taped it, so cannot see that it was falling apart.....so please pass on to Optronics

Frank profile picture

Frank

7/6/2025

Great....no problems. Surprising that is better and more sturdy than the original. So I guess that Optonics made some improvements


18
18

See what our Experts say about this Optronics Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S
Employee Michael B
Installed by:
Michael B
Employee John S
Video Edited:
John S

At etrailer 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.