4‑Way Flat to 7‑Way Round Blade Trailer Adapter

4‑pin flat to 7‑pin blade trailer wiring adapter, pure copper conductor, weather‑proof ABS housing, plug‑and‑play, complete mounting hardware for US RV, camper & trailer towing.

Order(MOQ):
100
Payment:
T/T,L/C,Western Union,Paypal,MoneyGram
Product Origin:
China
Color:
Black or Customized
Shipping Port:
Shenzhen
Lead Time：
7-14 Days

Product Details:

4-way flat to 7-way blade

4 way to 7 way trailer adapter

4 pin to 7 pin trailer adapter

4 way flat trailer adapter

4 wire to 7 way trailer adapter

4 way flat to 7 way RV blade adapter

Parameter Item	Specification
Product Name	4-Way Flat to 7-Way RV Blade Trailer Wiring Adapter
Service	OEM/ODM
Insulation Material	PVC
Housing Material	ABS / Nylon
Certification	UL, CE, ROHS, REACH, IATF16949, ISO9001, ISO13485, ISO14001. IPC-A-620
Pin Standard	US Standard 7 Way RV Trailer Socket
Wire Quantity	7 Color Coded Oxygen-Free Copper Wires
Cable Protection	Black Flexible Corrugated Plastic Conduit
Mounting Accessory	Black Coated Metal Bracket + 6 Bolts & Washers
Socket Housing	Automotive Grade PA66 Plastic
Connector Type	4-Way Flat to 7-Way RV Blade
Input Connector	4-Way Flat Male
Output Connector	7-Way RV Blade Female
Application	Pickup Truck, RV Camper, Boat Trailer, Utility Cargo Trailer
Sample	Support

Key Features:

Plug-and-play conversion: converts the vehicle's 4-way flat connector to a U.S. standard 7-way blade RV socket, supplying power for trailer turn signals, tail lights, and ground return circuit.
High-strength weather-resistant construction: ABS spring-loaded dustproof flip cover + PE corrugated tube, protecting the harness against rain, dust, and road salt spray corrosion.
Tinned pure copper terminals: provide stable conductivity, reduce heat generation, and prevent poor contact failures in trailer lighting during towing.
Complete installation kit: includes metal bracket, screws, and nuts; bolt-on mounting requires no complex wire-cutting operations.

Why Choose US?

We are a professional automotive & trailer wiring harness & cable assembly manufacturer with 15+ years production experience. We produce all types of RV trailer connectors, truck wiring harness, camper plug adapters, support OEM & ODM. 100% raw material inspection, full production QC testing, factory direct wholesale for global trailer parts distributors. Fast lead time, UL/CE/RoHS certified raw materials to meet US & EU market.

Aichie Tech

wire harness factory

cable assembly manufuturers

If you want to know more about our products,please contact us now!

	Tel: +86 769 23361430	WeChat: +86 18027502150
	WhatsApp: +86 18027502150	Skype: live:.cid.8643b3df38ff8b5
	Email: sales03@aichie.com	Online Store: www.aichie.com

FAQ:

Q1: What does a 4-way flat to 7-way trailer adapter do?

A1: It allows a vehicle with a 4-way flat trailer connector to connect to a trailer or RV equipped with a 7-way RV blade connector. It is commonly used for trailers, campers, RVs and boat trailers.

Q2: Can I customize wire length, wire gauge or change the connector type for bulk orders?

A2: Yes, our professional trailer wiring harness factory offers full OEM/ODM customization. We can adjust the overall cable length, upgrade to thicker wire gauges, change terminal types, and also redesign the socket housing based on market demand.

Q3: Is this a 4-core or 7-core wiring harness?

A3: The harness shown uses a 4-core input wiring configuration. The output connector is a 7-way RV blade connector, but the number of connector positions does not mean all seven circuits are powered by the 4-core input.

Q4: Does a 4-to-7 adapter provide electric trailer brake control?

A4: Not necessarily. A basic 4-way wiring system normally carries running lights, left/right turn signals, brake lights and ground. Electric brake, reverse and 12V auxiliary circuits require additional wiring where supported by the adapter design.

Q5: What is your minimum order quantity?

A5: We supply bulk wholesale for global trailer parts distributors. Standard stock model MOQ is 50 sets, larger order quantity gets extra volume discount, we can send full price list on request.

Q6: How long is your production & shipping lead time after placing an order?

A6: In-stock standard harness kits can be shipped within 7 working days. Customized modified wiring harnesses require 10–15 working days for production. We support sea freight, air freight and express delivery to all North American & EU countries.

Q7: Can I use this adapter with an RV or camper trailer?

A7: Yes. It is designed for common North American towing applications including RVs, campers, utility trailers, equipment trailers and boat trailers, provided the vehicle and trailer connectors match the specified 4-way and 7-way configurations.

Q8: Does 4-Way flat to 7-Way RV blade trailer wiring adapter have export certifications for shipping to USA?

A8: All raw copper wires and plastic socket materials hold UL、CE and RoHS certifications, fully comply with US automotive electrical safety standards, no customs clearance risks for US & EU shipments.

Q9: What if the harness fails or doesn’t fit my trailer after receiving? What’s your warranty policy?

A9: It is recommended to confirm the trailer socket standard before ordering. If a mismatch occurs due to our factory's mistake, we offer free replacement or a full refund. All trailer wiring harnesses come with a 12-month manufacturing warranty.

Trailer Cable Series