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  1. Custom Fit Vehicle Wiring
  2. Roadmaster
  3. 4 Flat
  4. Universal Fit
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
Roadmaster 4-Way Flat Connector with 12" Pigtail
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Roadmaster

Roadmaster 4-Way Flat Connector with 12" Pigtail

Part Number: RM35BQ
In Stock
$8.57
Retail:$9.39
You Save: 9%
Custom Fit Vehicle Wiring
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Add a 4-way flat connector to your trailer or vehicle. Comes with a 12" pigtail. 1-800-940-8924 to order Roadmaster custom fit vehicle wiring part number RM35BQ or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster 4-Way Flat Connector with 12" Pigtail. Custom Fit Vehicle Wiring reviews from real customers.
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Roadmaster Custom Fit Vehicle Wiring - RM35BQ

Highlights

  • Simple Trailer Lighting: 4-way flat connector powers trailer running, turn, and brake lights.
  • Quick Splice Setup: 12" pigtail lets you tie into existing wiring with minimal effort.
  • Reliable Connection: Plug-and-lead design ensures a consistent link between vehicle and trailer.
  • Universal Fit Use: Works as a vehicle-end connector for most standard trailer wiring setups.
  • Straightforward Design: No converter needed—just splice, plug in, and tow with confidence.

Features to know about

Easy Way to Add Trailer Lighting: 4-Way Flat Connector with 12" Pigtail

When you just need a simple connection for trailer lights, this 4-way flat plug gets it done. The 12" pigtail gives you enough lead to tie into your wiring cleanly, making it an easy way to hook up running, turn, and brake lights for basic towing setups.

Works with What You Already Have: Splice-In Design

Instead of hunting down special adapters or custom harnesses, the splice-in leads let you connect directly to existing wiring. It’s straightforward and flexible—cut, strip, and tie in where you need it. Perfect for adding a standard trailer plug to almost any setup.

Built for Simple, Reliable Connections: Plug and Lead Style

This plug uses a standard 4-flat layout that mates with most trailer connectors. It’s a solid choice for light-duty towing where reliability matters more than fancy extras. The molded connector and durable jacket help keep the connection steady and protected once installed.

Universal Fit for All Kinds of Projects

Because it’s a basic 4-flat vehicle-end connector with no converter built in, it works across a range of vehicles and trailers. Whether you’re wiring from scratch or replacing an old plug, this one keeps things simple and dependable from start to finish.

Specs

Electrical Specifications

  • Connector type: 4-Way flat
  • Pigtail length: 12"

Design and Compatibility

  • Application: Vehicle end connector
  • Installation type: Splice-in
  • Connector style: Plug and lead
  • Converter: No converter
  • Fit type: Universal fit
  • Category: Trailer hitch wiring

157-50 Road Master 4 Pin Plug with 12 In Wiring Harness

Similar to Hopkins HM41225





Video of Roadmaster 4-Way Flat Connector with 12" Pigtail
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Roadmaster Custom Fit Vehicle Wiring - Trailer Hitch Wiring - RM35BQ

Hi, everyone, Steven here with etrailer.com. Today, we're looking at a Roadmaster 4-Way Flat Connector with a 12 inch long pigtail. So folks, not much to say here today. Again, just your basic 4-pole flat. You have three on this side and a ground wire over here. And this would match up to a 4-way connector on the other end.

And then of course, you have this 12 inch lead with four wires, white, brown, yellow, and green. Traditionally, white is ground, green is your right turn signal, yellow is your left turn signal, and brown would be your running lights and brake signals as far as brake lights. So folks, that is gonna wrap it up for our quick look together at this Roadmaster 4-Way Flat Connector with 12 inch pigtail. I'm Steven, thanks for watching.

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Steven C
Installed by:
Steven C
Employee Wilson B
Updated by:
Wilson B
Employee Amanda K
Written by:
Amanda K

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