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Oyviny 4 Way Flat Trailer Extension Coiled Cable 5 Feet 4 Pin Male and Female Wiring Harness 18AWG 60" Stretchable Coiled Extension Wiring Cable with PU Sheath Dust Cover Plug & Play Extension
Oyviny

Oyviny 4 Way Flat Trailer Extension Coiled Cable 5 Feet 4 Pin Male and Female Wiring Harness 18AWG 60" Stretchable Coiled Extension Wiring Cable with PU Sheath Dust Cover Plug & Play Extension

Bottom line: The Oyviny 4 Way Flat Trailer Extension Coiled Cable 5 Feet 4 Pin Male: Coiled 60-inch cable retracts to about 40 inches so it never drags on the road; main trade-off: usable working length is roughly 40 inches, not the advertised 60.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Coiled 60-inch cable retracts to about 40 inches so it never drags on the road
  • ✓ Pure copper wires with tin-plated brass terminals for low-resistance 4-pin contact
  • ✓ 18AWG fully jacketed wire fits boat, horse, and cargo utility trailers with 4-way plugs
  • ✓ Rubber dust cover shields the female connector from road grit and water

Cons

  • ✗ Usable working length is roughly 40 inches, not the advertised 60
  • ✗ Only fits 4-pin flat systems; useless on 5, 6, or 7-way trailer wiring
  • ✗ Coil memory can pull on the vehicle socket if stretched near its limit
  • ✗ No inline fuse or circuit protection included in the harness

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SpecPicks Verdict

SpecPicks scored Oyviny 4 Way Flat Trailer Extension Coiled Cable 5 Feet 4 Pin Male… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Oyviny's power supplies & cables lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 4 Pin Extension: 4 way connector with fully jacketed cable 18 Guage wires, suitable for any types of trailers including marine boat trailer, horse trailer and other cargo utility trailers as long as it has a 4-way connection
  • Coiled Design: The coil design makes the wire does not drag but yet allows for the extra length needed for tight turns with a trailer, stretchable coiled wire keeps memory and effectively weatherproof
  • Sturdy Construction: Standard 4 pin female connector equipped with a rubber dust cover to protect the connector from dust and water, high temperature resistant PU Sheath makes the wiring wear-resistant, ensure good performance in various situations; Pure copper wires and Tin-Plated brass terminal ensure great conductivity
  • Easy Plug and Play: This 4 wire trailer lighting extension cable comes ready to plug into the existing 4 pole plug on your vehicle and trailer, No Splicing Required; 4 way connectors features tabs on the sides for a better grip when plugging and unplugging
  • Note: The designed length of this coiled cable is 5ft(60 inches), while the normal working length should be about 40 inches. Please confirm the length you need before ordering

Full Specifications

BrandOyviny
Color4 Pin Extension Coiled Cable- 5 Feet
Gauge18
Wattage1650 watts
Plug TypeType A
Unit Count1 Count
Item Length60 inches
Plug FormatType A
Model Number48\ Trailer Wire Harness Extension
Input Current15 A
Mfr Part NumberOV2134-001
Connector GenderMale-to-Female
Number of Outlets4
Case Material TypePolyurethane
Number Of Conductors4
Power Cord Prong Count4

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Oyviny 4 Way Flat Trailer Extension Coiled Cable 5 Feet 4 Pin Male and Female Wiring Harness 18AWG 60" Stretchable Coiled Extension Wiring Cable with PU Sheath Dust Cover Plug & Play Extension is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Oyviny 4 Way Flat Trailer Extension Coiled Cable 5 Feet 4 Pin Male and Female Wiring Harness 18AWG 60" Stretchable Coiled Extension Wiring Cable with PU Sheath Dust Cover Plug & Play Extension
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