CURT Truck Back Up Alarm for 7-Way RV Blade (Packaged) #57727

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This CURT electrical adapter is actually designed to extend a 7-way RV blade vehicle socket. It comes with its own backup alarm to send out an audible signal when your vehicle is in reverse and a dust cover to protect from dirt, water and road grime.

Quick Facts:

  • Integrated backup alarm sounds when vehicle is in reverse
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • Extends a 7-way RV blade connector vehicle socket
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Spring-loaded dust cover keeps connector clean when not in use
  • Extends a 7-way RV blade connector vehicle socket
  • CURT part number: 57727

There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers only need the bare essentials -- running lights, brake lights and turn signals -- while others require a connection for reverse lights, electric brakes and auxiliary power. With connectors ranging from simple to complex, it may be the case that the connection between your vehicle and your trailer is not a perfect match. For example, your truck may be equipped with a 6-way round socket, but your trailer may have a 4-way flat plug. For this very common problem, CURT offers a quick and simple solution in the form of an electrical adapter. An adapter is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket. It easily plugs in your vehicle's electrical socket and usually requires no additional wiring. CURT offers an array of adapters to accommodate most types of plugs and sockets, including 4-way flat, 4-way round, 5-way flat, 6-way round, 7-way RV blades and more. This electrical adapter plugs into a 7-way RV blade vehicle socket and equips your tow vehicle with its own backup alarm to send out an audible signal when your vehicle is in reverse. It also features a dust cover to protect from dirt, water and road grime. All CURT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence.


  • BACKUP ALARM. This trailer wiring harness extension features an integrated back up alarm that sounds at 97 decibels when your vehicle is in reverse. This promotes safety for your family, friends and others in the immediate vicinity
  • WEATHER-RESISTANT. This truck backup alarm comes with a spring-loaded dust cover for the 7-pin wiring socket to protect the terminals from water, dirt and corrosion
  • EXTENDER. This trailer wiring back up beeper plugs into your vehicle-side 7-way RV blade socket and extends it out for added clearance from the bumper or trailer hitch
  • STANDARD CONNECTION. This back up beeper for trucks plugs into any standard 7-way RV blade and can be used to connect the taillights, brake lights, turn signals, trailer brakes and auxiliary power
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this truck back up alarm is made from durable black plastic that will never rust or corrode

More Information
SKU 2020103593
Brand Curt™
Quantity In Package 1
Country of Origin TWN
Material Type Plastic
Unit of Measure EA
UPC 612314107742
Manufacturer Reference Number 57727

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