Optronics A25WH 25-Ft 5-Way Wishbone Trailer Wiring Harness with 4-Ft Trunk Connector

The Optronics A25WH is a 25-foot wishbone-style trailer wiring harness built for boat trailers and other split-frame trailers that need a dedicated fifth circuit for lights or brakes. The wishbone design splits into two runs at the rear of the trailer, each independently color-coded so tail lamps, stop/turn signals, and an auxiliary circuit can all be wired without splicing extra wire into the main harness. A 4-foot trunk connector extends the main run forward, making it easier to route the harness from the tow vehicle connector back to the trailer frame.

Each of the five conductors has a specific function: white for ground, brown for tail lamps, yellow for the driver side stop/turn signal, green for the passenger side stop/turn signal, and blue for auxiliary use such as additional lighting or a brake circuit. This color coding matches standard trailer wiring conventions, so the A25WH can be used as a direct wire-for-wire replacement on trailers already following that scheme. The harness is constructed of wire suited for trailer wiring applications and ships in retail clamshell packaging, making it easy to identify and install as a complete replacement harness rather than sourcing individual wire runs.

Specifications

• Brand: Optronics
• Manufacturer Part Number: A25WH
• Harness Length: 25 feet
• Trunk Connector Length: 4 feet
• Wire Configuration: 5-way (5-conductor) wishbone split harness
• Wire Colors and Functions: White - Ground; Brown - Tail Lamps; Yellow - Driver Side Stop/Turn; Green - Passenger Side Stop/Turn; Blue - Auxiliary Use
• Material: Wire
• Packaging: Retail clamshell
• Package Dimensions: 1.42 x 1.34 x 0.51 inches
• Weight: 0.94 pounds
• UPC: 047286792519

Fitment

Universal wishbone-style trailer wiring application; not limited to a specific make or model.

Replaces (OEM)

No specific OEM cross-reference numbers are listed for this harness.

Frequently Asked Questions

How long is the Optronics A25WH wiring harness? The main harness run on the A25WH is 25 feet long, plus a separate 4-foot trunk connector that extends it toward the tow vehicle end.

What does each wire color on the A25WH do? The A25WH uses five color-coded wires: white for ground, brown for tail lamps, yellow for the driver side stop/turn signal, green for the passenger side stop/turn signal, and blue for auxiliary use.

Is the A25WH a 4-way or 5-way harness? The A25WH is a 5-way wishbone-style harness, meaning it has five conductors instead of the standard four, with the fifth (blue) wire reserved for auxiliary use like extra lights or a brake circuit.

What is the trunk connector used for? The 4-foot trunk connector included with the A25WH extends the main wiring run, giving extra length to route the harness from the vehicle connector back toward the trailer wishbone split.

What is the wishbone design on this harness? A wishbone harness splits into two branches at the rear of the trailer so each side's tail, stop, and turn signal wiring runs separately from a shared main line, which is how the A25WH is configured.

What material is the A25WH made from? The A25WH wiring harness is constructed of wire rated for trailer wiring applications.

How is the Optronics A25WH packaged? The A25WH ships in retail clamshell packaging, ready for display or direct installation.

Does the blue wire on the A25WH control brakes or lights? The blue wire on the A25WH is designated for auxiliary use, which can be wired to power additional lights or a brake circuit depending on the trailer's setup.

What is the weight of the A25WH harness? The Optronics A25WH weighs 0.94 pounds.

Will the A25WH fit any trailer make or model? The A25WH is a universal wishbone-style trailer wiring harness and is not restricted to a specific trailer make, model, or year.

What is the UPC for the Optronics A25WH? The Optronics A25WH carries UPC 047286792519.