40 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire

40 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire

Item # A40W5B

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A40W5B - 5 Flat Optronics Trailer Connectors
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  • Trailer Connectors
  • Trailer End Connector
  • 5 Flat
  • Plug and Lead
  • Optronics
  • 40 Feet Long
5-Way trailer harness connects to your tow vehicle to control trailer light functions. Wishbone-style harness comes with 2 tail light wires split for simple wiring. Auxiliary wire signals trailer brakes to disengage when in reverse. Lowest Prices for the best wiring from Optronics. 40 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire part number A40W5B can be ordered online at etrailer.com or call 800-298-8924 for expert service.


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  • Reviews (47)
  • Q & A (18)
  • Videos (1)
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  • Why etrailer?

Optronics Wiring - A40W5B

5-Way trailer harness connects to your tow vehicle to control trailer light functions. Wishbone-style harness comes with 2 tail light wires split for simple wiring. Auxiliary wire signals trailer brakes to disengage when in reverse.


Features:

  • 5-Way trailer harness connects to your tow vehicle to control trailer light functions
    • Ideal for marine trailers with hydraulic or surge brakes
  • Wishbone-style harness comes with 2 tail light wires split for simple wiring
    • Allows you to run wires separately down each side of the trailer to tail lights without needing a jumper wire
  • Auxiliary wire (blue) connects to backup light circuit to disengage surge brakes when you are driving in reverse
    • Hydraulic actuator must have electric lockout feature built-in to disengage the trailer brakes
  • Color coded wires help with installation
    • White - ground
    • Brown - tail lights
    • Yellow - driver side stop/turn
    • Green - passenger side stop/turn
    • Blue - auxiliary wire


Specs:

  • Wire harness length: 40'
  • Ground wire length: 30"
  • Auxiliary wire length: 5'


Manufacturer Cross Reference
Harness will work as an exact replacement for:

  • Truck Lite # 002295


A40W5B Optronics 40 ft. Wishbone 5-Way Trailer Harness with 30" Ground and 5 ft. Blue Wire

Alternate part number: A-40W5B






California residents: click here


Video of 40 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire


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




Video Transcript for Optronics Wiring - Trailer Connectors - A40W5B Review

Today, we're going to review part number A40W5B. This is the Optronics 40-foot wishbone 5-way trailer wiring harness. This, you can see, has a 5-way flat trailer end connector here already built in, uses the size 20 gauge wires in this. It is a 40-foot long harness, has this additional 30-inch long ground white wire with the eyelet on it to get a good, clean ground, and it also contains this 5-foot long reverse light blue wire, which is usually used to disengage a surge break coupler. Typically what happens on a 5-way flat connection, it's normally used on trailers with surge breaker hydrolic brakes and basically, this additional blue wire would be tapped into your reverse light circuit to disengage that couple or actuator when the vehicle is in reverse, thus turning off your trailer brakes so they don't get activated. This is a wishbone wiring harness and basically, what that means is they have a taillight wire running down both sides of the trailer. The taillight wire goes along with the yellow turn and brake signal wire and the green turning brake signal wire. It makes it more efficient way to wire your trailer. That should do it for the review on part number A40W5B, the Optronics 40-foot wishbone 5-way trailer wiring harness.

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Customer Reviews

40 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire - A40W5B

Average Customer Rating:  4.8 out of 5 stars   (47 Customer Reviews)

5-Way trailer harness connects to your tow vehicle to control trailer light functions. Wishbone-style harness comes with 2 tail light wires split for simple wiring. Auxiliary wire signals trailer brakes to disengage when in reverse.

- A40W5B
by:

Exactly what I ordered and rcvd it quic kly. 608650



- A40W5B
by:

I got my 40ft wishbone trailer harness in about 5 days. Was held up a day because of the Christmas holiday. All in all I was quite satisfied with my purchase. I'm putting "Pole Lights" on my trailer to keep them out of the water. I didn't want to "splice any wires", so I ordered the 40ft length. I have not yet installed this, but plan to start today. Its been a very busy holiday season, and now time to get to work. Capt. Jim Hedgecock 111543



- A40W5B
by:

Excellemt product and service as always. Etrailer is the best source for your products . They have outstanding service and pricing. 40753



- A40W5B
by:

Perfect product and service Thank u 633292



- A40W5B
by:

Another great product with super service from etrailer. 621672



- A40W5B
by:

Was perfect for my boat trailer 614399



- A40W5B
by:

Works 599457



- A40W5B
by:

good pricing , excellent service , quality product thanks 584957



- A40W5B
by:

Exactly what I needed to rewire my vintage trailer. 579236



- A40W5B
by:

Thanks just what you said and very fast service 560579



- A40W5B
by:

I got the product today (7/5/18) and installed it today (7/5/18) and I’m very pleased with the product. This is a great company, the customer service is great. 538327



- A40W5B
by:

Intelligent and efficient on time and great price! 527986



- A40W5B
by:

Product was great easy to wore and has held up great 513306



- A40W5B
by:

My 5 pin, 40' wire harness arrived within just a couple days. Excellent price and Excellent service. Thank you etrailer.com. 509640



- A40W5B
by:

Good transaction. As described and quick delivery 504772



- A40W5B
by:

My order shipped the next working day and arrived exactly as described. 481151



- A40W5B
by:

Product is just what I needed. 473799



- A40W5B
by:

Already installed. Received in 2 days. Works perfect. 450432



- A40W5B
by:

As always etrailer supplied me with a quality product with quick shipping. Great customer service also 434734



- A40W5B
by:

This product made it simple to re-wire my boat trailer, and was delivered as promised. Excellent customer service was given to change my order after I had discovered I had originally ordered the wrong part. 427636



- A40W5B
by:

Fast shipping,great,product. 427595



- A40W5B
by:

Order was exactly what I wanted and would order again for any future project 419831



- A40W5B
by:

etrailer is a the only place I could find this item as I live in a rural area. The harness was perfect and did the job well. Service and shipping time was perfect. 412016



- A40W5B
by:

Exactly what I needed quality product at a great price! 394514



- A40W5B
by:

Etrailer is awesome Great website for detailed parts I buy from etrailer all the time 378786


Comments

Great etrailer is awesome

Jim m - 05/10/2018

38351

- A40W5B
by:

the only way to rewire a trailer. 374126



- A40W5B
by:

works great 370497



- A40W5B
by:

Doesn't get any easier! Product described well. Easy navigation on order page, checkout and product arrived in a reasonable time. Will install the harness this weekend.. 367490



- A40W5B
by:

Excellent wiring harness!! Hasn't given me any trouble in over a year. 366961



- A40W5B
by:

Exactly what I needed and was actually the only place I could find that had this configuration. Shipped and received before expected. Will definetly use them again. Well done guys. 347671



- A40W5B
by:

Perfect amount for total trailer rewire 336335



- A40W5B
by:

Product was shipped quickly and matched the product description. Tried to find it locally for a price comparison but nobody stocked this item. Shopped online and etrailer.com had the best price. Good product, good service. Thank you. 310223



- A40W5B
by:

Great product. Had excellent service and fast shipping. Great company. Highly recommended. 304597



- A40W5B
by:

Item was exactly as described and shipped promptly upon order. Great experience. 265617



- A40W5B
by:

Got my order super fast. Great place to order from. 256461



- A40W5B
by:

worked as expected 255644



- A40W5B
by:

My order was shipped quickly and correc tly. 255412



- A40W5B
by:

Perfect to rewire my trailer and have perfect lighting once again. 249775



- A40W5B
by:

I received this order quite a bit faster than I had expected.. It came as ordered. I haven't as yet had time to install product. It does look fine though. Thanks for the correct order, and the very fast shipping.. I WILL be back. 238029



- A40W5B
by:

For the price, speed, quality is great. I don't know of anything better. It would be great if there was a larger AWG 40' kit, but this is the best you can get. 114603



- A40W5B
by:

Just what I was looking for. I believe this is going to work as I run the wire from the front of my 5th Wheel to the back. 109651


Comments

It is working out fine. Thanks Etrailer.

John B - 12/09/2014

7976

- A40W5B
by:

Everything was great.Website was very helpful unlike a few boat sites I checked. 96474



- A40W5B
by:

Product was just as described and made the rewiring of my boat trailer a LOT easier! 71298



- A40W5B
by:

Just as described and cheap/quick shipping. Thanks! 68507



- A40W5B
by:

Very fast shipping.. Looks like its gonna be a breeze to install.. 38864



- A40W5B
by:

Quick shipping and easy use of web site for ordering will reuse again 22643



- A40W5B
by:

Design wise it is excellent, the wishbone design is intelligent and makes rewiring a boat trailer simple and clean. The Good rating? The wire gauge looks to be 18-20, wish it was heavier gauge, especially since it is a 40 ft long harness. And it is made in China or Taiwan, not a heavy duty or perfect construction. If it lasts as long as my original, 14-years, I'll come back and bump up my rating, and I bet you can't find a better one. As far as the transaction, it was excellent, had the 40 footer I needed, great price and super fast shipping. 9274


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47

Ask the Experts about this Optronics Wiring
Do you have a question about this Wiring?


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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Brian T

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