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Curt 56130 Basic 4-Pin to 4-Pin Flat Trailer Wiring Converter - Small, Packaged

CURT 56130 basic small 4-pin flat to 4-pin flat trailer wiring converter, packaged, for RV and trailer towing applications
 
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: $26.40
Part Number: 56130
Manufacturer: Curt MFG

Quantity in Stock :37

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CURT Mfg4-Pin FlatPlug-and-PlayCURT 56130 Basic 4-Pin Trailer Wiring Converter -- Small, Packaged

If your tow vehicle uses a combined stop/turn signal but your trailer wiring expects separate brake and turn outputs -- or vice versa -- the CURT 56130 bridges that gap in seconds. No splicing, no soldering, no rewiring the harness. Just plug it in between your vehicle connector and trailer connector and go. Compact enough to tuck behind a receiver or bumper, this small packaged converter is a clean, reliable fix for mismatched trailer lighting systems.

Stop Fighting Mismatched Trailer Wiring

Towing compatibility problems are rarely about the hitch -- they're usually about the wiring. North American vehicles often output a combined stop/turn signal on a single wire, while many trailers (especially older units and imported trailers) are wired for separate brake and turn functions. The CURT 56130 converter sits in-line between the two systems and translates the signal automatically, so every light on your trailer works exactly as intended.

This is a common issue when towing boat trailers, utility trailers, enclosed cargo trailers, and camper trailers that were built to a different wiring standard than your tow vehicle. The 56130 eliminates the guesswork with a simple inline solution sized to fit in tight spaces behind the rear bumper or receiver area.

Combined to Separate Signal Conversion

Converts a combined stop/turn signal output from the tow vehicle into separate brake and turn signals required by the trailer -- no splicing needed.

Compact Small Form Factor

Overall package dimensions of 9.0 x 4.0 x 2.0 inches. The converter module itself is sized to tuck neatly behind a receiver or bumper bracket.

Standard 4-Pin Flat Connectors

Uses the universal 4-pin flat connector format found on the vast majority of light-duty trailers and tow vehicles in the North American market.

No Tools Required

Plug-and-play installation. Simply connect the converter between your existing vehicle plug and trailer plug -- ready to use in under a minute.

What Is a Trailer Wiring Converter and Do You Need One?

A wiring converter (also called a signal converter or trailer wiring adapter) does not change the plug shape -- that is the job of an adapter. A converter actually reads the incoming electrical signal from your tow vehicle and outputs a different signal format to the trailer. This is an active or passive electronic function, not just a pin rearrangement.

You need the CURT 56130 if:

  • Your tow vehicle outputs a combined brake/turn signal (one wire handles both functions on each side) but your trailer requires separate brake and turn wires
  • Your trailer tail lights are malfunctioning -- turn signal activates the brake light, or brake light triggers the turn signal incorrectly
  • You are connecting a European-style or older domestic trailer to a modern American tow vehicle
Quick Compatibility Check: If your tow vehicle has a standard 4-flat plug and your trailer also has a 4-flat plug but the lights behave incorrectly when connected, a signal converter like the 56130 is almost certainly the fix -- not a new wiring harness.

Typical Towing Applications

The CURT 56130 is a general-purpose solution suited for a wide range of light-duty towing scenarios. Common uses include:

  • Boat trailers and personal watercraft trailers
  • Utility trailers and landscape trailers
  • Small enclosed cargo trailers
  • Pop-up campers and small travel trailers with 4-flat connections
  • ATV and UTV trailers
  • Motorcycle trailers
Where This Fits in the CURT Lineup: CURT offers a full range of trailer wiring converters, adapters, and harnesses under their electrical accessories line. The 56130 is the small, basic packaged variant -- a compact single-purpose converter for 4-pin flat to 4-pin flat signal conversion. For larger or more complex wiring needs (5-pin, 7-pin, or custom harness applications), CURT offers additional part numbers in the same series.

Installation Tips for RV and Trailer Owners

Installing the CURT 56130 is straightforward, but a few best practices will ensure years of trouble-free operation:

  • Route the converter so it is not resting directly on pavement or dragging -- use a zip tie to secure it to the receiver tube or safety chain loop
  • Keep connections clean and dry -- apply dielectric grease to the 4-pin flat connector faces to prevent corrosion, especially in wet or road-salt environments
  • Test all four trailer lighting functions before every trip: left turn, right turn, brake lights, and running lights
  • If lights are dim or flickering after installation, check the vehicle-side connector for corrosion before suspecting the converter
Maintenance Tip: Dielectric grease applied to the connector pins at installation will dramatically extend connector life, particularly for boat trailer use where saltwater exposure is frequent. Reapply once per season for best results.

Package Specifications

ManufacturerCURT Manufacturing
Part Number56130
UPC612314561308
Package Weight0.59 lbs
Package Dimensions9.0 x 4.0 x 2.0 inches
Packaging StyleRetail packaged (carded)

Electrical Specifications

Connector Type4-pin flat (both vehicle and trailer side)
Conversion FunctionCombined stop/turn to separate stop and turn signals
Circuit Functions SupportedLeft turn, right turn, brake, running lights (tail/marker)
Wiring StandardSAE/North American 4-flat trailer wiring

Fitment and Compatibility

Vehicle SideStandard 4-pin flat tow vehicle connector
Trailer SideStandard 4-pin flat trailer connector
Typical Tow VehiclesTrucks, SUVs, minivans, and cars with factory or aftermarket 4-flat trailer connectors
Typical TrailersBoat trailers, utility trailers, small campers, cargo trailers with 4-flat connectors
Not Compatible With5-pin, 6-pin, or 7-pin trailer connectors (different CURT part numbers required)

What Is in the Box

IncludedCURT 56130 wiring converter module, retail packaging
Not IncludedMounting hardware, dielectric grease, extension cables
Important Information
  • This converter changes the signal format between vehicle and trailer -- it does NOT change the connector shape. If your vehicle and trailer have different plug types (e.g., 7-pin to 4-pin), you need a wiring adapter, not this converter.
  • Verify your tow vehicle actually outputs a combined stop/turn signal before purchasing. Some newer vehicles with trailer wiring packages already output separate signals and may not require a converter.
  • Do not exceed the rated load for the 4-pin flat connector format. Running additional accessories (trailer electric brakes, 12V charge lines) requires a 5-pin or 7-pin connection system.
  • Inspect the converter and connectors before each towing season. Replace if the housing is cracked, pins are corroded, or the wiring insulation shows damage.
  • Not intended for use with electric brake controllers or trailer brake systems -- those applications require a 7-way RV-style connector with a dedicated brake output wire.


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