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25 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire
(79 reviews)
Price: $24.87
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25 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire
Part Number: A25W5B
In Stock
$24.87
Retail:$53.53
You Save: 54%
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- All Info
- Reviews (79)
- Q & A (0)
- Photos
Optronics Custom Fit Vehicle Wiring - A25W5B
- 5 Flat
- Universal Fit
- Trailer Hitch Wiring
- Vehicle End Connector
- Splice-In
- Plug and Lead
- Optronics
- No Converter
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: 25'
- Wire gauge (all): 20
- Ground wire length: 30"
- Auxiliary wire length: 5'
Manufacturer Cross Reference
Harness will work as an exact replacement for:
- Truck Lite # 002275
A25W5B Optronics 25 Ft 5-Way Trailer End Wishbone Wiring Harness - 30" Ground - 5' Blue Wire
Alternate part number: A-25W5B
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.6
79 reviews
by:
Vincent
05/18/2018
So, I converted my brand new Loadrite trailer to LED'S and wanted to add up a reverse light. I purchased this 5 wires trailer light harness to do the trick. Very good quality and the color code stayed the same. Had no problem what so ever and was an easy swap. I soldered every wires and protect them with heat shrink tubing and that should last a very long time.
Thank you.
Thank you.
by:
Glen E.
02/01/2017
I purchased this set to rewire my race car trailer and add reverse lights to the pigtail... wiring went flawlessly and there was plenty of wire and connectors are good quality... even had a dog chew on the trailer end and other than a slight ground issue, works perfectly.
by:
Chris
10/25/2026
As advertised and on time.
by:
Mike B
09/06/2019
Got this wiring harness for my small camper to completely re wire it. Also got rheTLl28RK combination trailer lights. Nice and bright!
by:
Ernie
12/10/2025
This company is my number one go to for trailer needs.
Mike L.
12/10/2025
Thanks Ernie, we're glad we could help!!
by:
Jared
09/18/2020
Easy to install perfect length and works great!! Can’t see it on the trailer because I have it heat shrinked and wire loomed for protection
by:
jimmy B.
10/07/2016
5-wire harness kit is exactly what I need. I hate splicing wiring runs because, in a saltwater environment, this only leads to more chances for corrosion. The only thing that would be better is the complete round plug set-up.
My boat and truck are happy!
My boat and truck are happy!
by:
Timothy
08/13/2026
Worked perfectly. Thanks for the help
by:
Derek
03/11/2025
Works very well. Ran the wires down the tubes of my boat trailer and installed the tail lights and runners very easily. Cut the excess wire off and lights are solid after one year on my boat trailer.
Brooke M.
3/12/2025
So glad to hear that, Derek! We just had a tutorial here at the office and I was blown away at how straight forward it can be. What do you haul with the trailer? Anything fun?
by:
Douglas
06/20/2025
25 ft 5-way wiring harness (auxiliary 5 ft Blue wire - backup lights for my application when vehicle is in reverse). This was excellent for me to use to make my boat trailer lights (with addition of lights / backup lights on guide poles) work. Very Easy to wire up.
by:
Howard
05/29/2026
It was a job well done.
by:
Cale
10/24/2024
I installed this on a Moomba boat trailer and it fit perfectly. Installation was easy enough. Paired with e-trailer's submersible LED trailer lights, the parts went together for a seamless, durable system that will last for years to come. The boat trailer looks like new again! Thanks e-trailer!!
by:
M Grey
01/06/2022
This product was exactly what I was looking for. I was having issues with my trailer lights on a 20 year old trailer. I decided it was best to just remove all of the old wiring and start off new. This product took care of any concerns i might have had by just replacing a wire or two. All of the lights and connections are excellent and I don't worry about something not working.
by:
Hawk
08/05/2022
After having this in my garage for about 6-9 months I finally got around to rewiring my trailer with this harness. The harness has been on the trailer for 4 months and it has been solid. I would recommend getting longer than you think you will need. IE if you have a 25 ft trailer get a harness that is ~30 ft.
by:
J Paul
06/15/2015
Wiring is great. Was given 2 truck tail lights with back up lenses so I needed to rewire my trailer for a 5 wire system. My trailer is 30 years old so it needed a complete makeover. e trailer was a great help. They had a 5 wiring harness and a duel trailer connector for my Jeep. I needed a 4 wire and a 5 wire adapter to fit the Jeep to 2 trailers I own. They had what I wanted and it was delivered in 3 days.
by:
Jonathan
07/16/2024
Very high quality wire, easily stripped outer and very good quality copper wire within. All connections were spliced and soldered, covered with heat shrink.
Easy to use. Again, having back-up is a game changer. Long overdue and nice to have affordable quality product to upgrade with.
Easy to use. Again, having back-up is a game changer. Long overdue and nice to have affordable quality product to upgrade with.
by:
David
03/06/2013
This wiring is almost plug and play! It is already set up with double brown wires to meet today's trailer wiring standard. And with the hitch-end flat plug and ground ring already in place, it is a quick installation. Thanks.
by:
Werner
06/14/2019
Fast shipping and great product. Easy to install on my boat trailer. Will test the longevity of this product over the next several years. But overall very pleased, and etrailer is a wonderful company.
by:
John
04/16/2020
Great, I think I will enjoy the install, with all that's going on in the World. Thanks for the extremely fast delivery and help with making my selections!
I did make one mistake, the Thin LED Light I order; I think I need to order the base bracket as well!
I did make one mistake, the Thin LED Light I order; I think I need to order the base bracket as well!
by:
Neil
10/22/2022
I have been in sales, retail, B2B, and sales management for over 30 years. E trailer has the whole package - excellent customer and sales service, great products, videos for those of us who like to do our own work, fair prices, and my go-to for my trailer needs.
by:
Bmn
04/10/2016
Well made product easy to install.Delivered in 3 days,with free shipping as I ordered it with a few other items.Priced very reasonable. I am very happy with my order.
by:
Joseph
07/23/2022
I. ordered this along with marker lights its been a year and they work great.
by:
Jay
09/26/2017
Needed to replace my wiring on my 18 foot boat trailer. This did the job. Easy plug and play.
by:
Bobby
09/23/2024
Average quality, very good shipping time plus hard to find item but etrailer had it.will definitely be buying from you guys in the future.
by:
Jack
04/12/2019
Product works well. Installed on boat trailer used primarily in saltwater. Corrosion is minimal.
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Info for this part was:
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Updated by:
Brian T
Updated by:
Noah M
Video Edited:
John S
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Vincent
5/19/2019
George, after one year, Im pleased to say that your product still perform flawlessly. All is good with the harness and would recommended to all of your potential customer. Thank you for the follow up a year later, really show whos taking care of his customer. Again, thank you,