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CURT 57727 Truck Backup Alarm for 7-Way RV Blade Trailer Wiring , Black

Free shipping on orders over $29.99

$20.50

$ 8 .99 $8.99

In Stock

About this item

  • 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


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..


Mike S
2025-07-27 17:01:37
I wanted this for when I have my camper on my truck so I can be assured people close by are aware I am backing up. This installed perfectly in just a few seconds. It's not commercial-truck-loud, and it could even be quieter. But it does the job that it's intended for.
zach w.
2025-07-22 17:21:26
Super quick install and it seems to be of good quality. The only reason for four stars instead of five is the volume of the alarm isnt the best but it gets the job does in most cases. Good value for the money
Scott
2025-07-12 12:12:27
As others have stated the beeper isn't the loudest but it'll get the attention of those around. Works well and super easy install. Great safety item at a great price
Bri
2025-06-23 14:41:28
loud enough to warn people in parking lots. Not loud enough for construction sites. cover don't want to close after using.
Kidd
2025-06-16 12:19:24
It's a nice compact piece. And it does have an alarm in it but...I worked with heavy equipment and buses for 37 years. And they all have "backuo" alarms. All are at industry minimum of 95 dB. This item here is NO WAY 97 dB as advertised. I can barely hear it with both windows open on a light duty regular cab 1500 pickup truck. I'm contemplating sending this waste of money back over the weekend.
Customer
2025-06-02 14:49:50
Plugged this into a 2003 Toyota 4Runner Limited for my teenaged daughter. You can hear it from inside, but not too loudly - and not really at all with music playing. From outside it's just loud enough for those in the immediate area to hear - like a grocery store parking lot. I've been able to see people pause and look up when backing up, so it works great!
Randy Howard
2025-05-29 18:01:15
As stated it installed directly into the 7 pin plug on our truck. Since we need to use it without a trailer at times, we drilled a hole in the spring loaded cover to ensure it can be heard as the cover does muffle the sound substantially.
Luis Suarez
2025-05-27 12:55:03
Got this mainly to incorporate a beep sound when backing up my Toyota 4 Runner. The device seems well constructed and sturdy. The reason i did not give 5 stars is because i think it lack a means to secure the device to the car, seem quite possible for the device to fall off or be stolen.
Tim Brown
2025-05-20 09:27:49
Great product, worth the extra $$.
Ken R.
2025-05-17 10:19:30
It is easy to use. It is NOT crazy loud. Which my neighbors can appreciate.
Dylan G.
2025-02-12 13:32:28
Works really good, but as others have said it's REALLY quiet... My diesel truck is deleted, but HAS a muffler and cats, but you can't hear it over the exhaust....Then randomly one day (after the return window...) it stopped working and hasn't worked since.Feels like it's a cheaper quality device....
Dave R.
2025-02-05 14:27:21
Hoping it lasts. So far it's perfect
SMAC
2024-12-31 14:01:25
Timely delivery but not the product I expected. Beeper was not very loud and it has connection issues
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