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Nilight - 10039W 4 Pin Flat Trailer Wiring Harness Kit 18AWG 25Feet Male 4Feet Female Wishbone-Style Wiring Harness Extension kit for Utility Boat Trailer Lights
✅ In stock
F
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 29, 2026 12:40 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price is slightly above the going rate for this product — worth watching for a drop.
- 📉It has been quite a while since a more competitive price was available, lending today's offer solid comparative value.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
1.07/20
Deal Strength
0/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Amazon.com
🚚 Shipping
Free Shipping
Product Details
✓Wire Length: Comes with 18AWG 25ft male and 4ft female connector wire, both with full ground wire for your use. Designed to split at the trailer tongue and run down each side of the trailer to supply power for trailer lights
✓Built To Last: Employ quality pure copper wire with tin plating for the best current conductivity and anti-oxidation ability, and premium PVC coating for the best anti-corrosion and anti-aging ability. Withstand sea water, no brittleness, no break, durable to last
✓Standard 4 Way Flat Connector: Male plug with 5 wires, female plug with 4 wires. Plug and play, matches with any other standard 4 pin flat plugs
✓Color Coded Wires: Wires are color coded and bonded, white for ground, brown for running and license light, yellow for left stop turn and green for right stop. Easily to route into your trailer's wiring system and connect with lights
✓Universal Application: Work perfectly on trailers under and over 80” wide such as marine boat trailer, cargo utility trailer to install trailer lights
⚙️ Specifications
Brand
Nilight
Connector Type
Standard 4pin Flat Connector
Cable Type
Copper wire with PVC insulation
Compatible Devices
Trailers
Special Feature
Weatherproof, Waterproof
Compatible Phone Models
No Compatible Phone Models
Recommended Uses For Product
Installing trailer lights on utility boat trailers, marine boat trailers, and cargo utility trailers
Color
4 Pin Trailer Wiring Harness
Connector Gender
Male-to-Female
Shape
Flat
Number of Pins
4
