Anderson 4-Way Wishbone Trailer Wiring Harness Kit, 25 ft.
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Anderson 4-Way Wishbone Trailer Wiring Harness Kit, 25 ft.
This wishbone-style 4-way trailer wiring harness is designed to simplify the wiring of boat, utility, and recreational trailers. The harness splits at the trailer tongue and runs independently down each side, eliminating the need for a cross-over wire at the rear lights and making side marker light installation straightforward. At 25 feet total length, it covers most standard trailer configurations right out of the box.
Features
- Wishbone (Y-split) design routes wiring down each side of the trailer independently
- 4-conductor harness with flat 4-way plug — the most common trailer connector standard
- 48" trunk connector included for tow vehicle connection
- Polarized flat plugs prevent incorrect connection
- BIA standard color-coded wires meet SAE J558a and NMMA specifications
- 25 ft. total harness length
Compatible Applications
- Boat trailers
- Personal watercraft (PWC) trailers
- Utility and cargo trailers
- Landscape and equipment trailers
- Any trailer requiring a standard 4-flat wiring connection
Parts Desk Insights
Best Use Case: This is the go-to harness for a full trailer rewire or new trailer build where you want a clean, factory-style installation. The wishbone layout is ideal when your trailer has side marker lights, as it eliminates the messy cross-over wire that causes problems on longer trailers. If you only need to replace the tow vehicle side connector, see the 4-Way Flat Trailer Harness 48" Car Side. For trailer-side connector replacements, the 4-Way Flat Trailer Harness 48" Trailer Side is a direct fit. Need a complete lighting solution? Pair this harness with the Anderson Under 80" Trailer Light Kit or the Anderson LED Under 80" Wide Trailer Light Kit for a full plug-and-play setup. For frame clip management during installation, the Anderson Medium Trailer Wiring Harness Frame Clips keep wiring secured and protected.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
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For return authorization, please contact our support team before shipping anything back.