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Curt 5-Pole Flat Vehicle Wiring Harness w/ Mounting Bracket

Curt 5-Pole Flat Vehicle Wiring Harness w/ Mounting Bracket

Item # C58545
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Wire your vehicle to tow a trailer with this universal, splice-in wiring kit. Includes 5-way flat connector, bonded wire, mounting bracket, and necessary hardware. Designed for use with 2-wire electrical systems. Lowest Prices for the best trailer wiring from CURT. Curt 5-Pole Flat Vehicle Wiring Harness w/ Mounting Bracket part number C58545 can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (12)
  • Q & A (0)
  • Videos (1)
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CURT Trailer Wiring - C58545

  • Trailer Connectors
  • Vehicle End Connector
  • 5 Flat
  • Plug and Lead
  • CURT

Wire your vehicle to tow a trailer with this universal, splice-in wiring kit. Includes 5-way flat connector, bonded wire, mounting bracket, and necessary hardware. Designed for use with 2-wire electrical systems.


  • 5-Way flat trailer connector at the back of your vehicle powers your trailer's signal lights
    • Compatible with 4-pole, 6-pole, and 7-pole adapters (sold separately)
  • Rubber-molded connector and bonded wire provide maximum durability
  • Simple installation
    • Hardwires to existing wiring
    • Includes quick-splice connectors for easy splicing of wires
  • Electrical mounting bracket lets you attach connector to your vehicle
  • 1-Year limited warranty

58545 Curt 5-Way Flat Connector Socket Kit

California residents: click here

Video of Curt 5-Pole Flat Vehicle Wiring Harness w/ Mounting Bracket

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Wiring - Trailer Connectors - C58545 Review

Speaker 1: Today we're going to take a look at the Curt 5-way flat vehicle wiring harness with the mounting bracket. Now this will allow you to wire your vehicle to tow a trailer with this universal splice and wiring kit. It includes everything shown here on the table, the 5-way flat connector. It's connected to 60-inch bonded wire lead, the mounting bracket and the hardware for installing it, and quick-splice connectors. This is designed for use with a two-wire electrical system. Now the 5-way trailer connector right here at the back of your vehicle, this will power your trailer signal lights.

It is compatible with 4-pole, 6-pole, and 7-pole adapters that we do sell separately.It is a nice rubber molded connector, and the bonded wire provides maximum durability. It's a very simple installation. On the pigtail end here, you just hard-wire to existing wiring, and it even uses the quick-splice connectors for easy splicing of the wires. The mounting bracket lets you attach the connector to your vehicle, has the mounting hardware to install this, and then just push your 5-way through there and it'll hold it right into place. But that should do it for the review on the Curt 5-way flat vehicle wiring harness with the mounting bracket..

Customer Reviews

Curt 5-Pole Flat Vehicle Wiring Harness w/ Mounting Bracket - C58545

Average Customer Rating:  4.8 out of 5 stars   (12 Customer Reviews)

Wire your vehicle to tow a trailer with this universal, splice-in wiring kit. Includes 5-way flat connector, bonded wire, mounting bracket, and necessary hardware. Designed for use with 2-wire electrical systems.


Satisfied with this product. Everything included to install it. Plenty of wire length.


Easy installation. At first I was concerned about the wiring until I spoke with a representative whom walked me through the installation process. I’m not electronically inclined.


Great product, keeps the plug up and out of the water/saltwater.

Great product, still have it and still works
Larry C - 01/31/2021


Installed easily and works well. I am a little disappointed that it has already started to rust.


Exactly what I needed and delivered in short order.



Easy to install works perfect







See what our Experts say about this CURT Trailer Wiring

  • 5-Way Flat Trailer Wiring Harness for a 1999 Harley Electra Glide
    I can tell you what you will need to install a 5-Way flat connector on your 1999 Harley Electra Glide but we do not have any custom fit wiring harnesses for any motorcycles. Harness # 33525 was designed for a 2005 or 2006 Nissan Frontier. All you really need is a vehicle side 5-Way connector such as # C58545. All you would need to do is splice in this harness to the appropriate wires on the bike. The white wire is ground, brown is running/tail lights. Yellow is normally left turn signal...
    view full answer...
  • Can the Wesbar 5-Pole Flat Connector be Used on a Reverse Circuit
    Yes, you are correct in that the blue wire on the Wesbar 5-Pole Flat Connector part # W002290 can be used for the reverse light circuit. I have listed for you below the way I recommend wiring the connector. Yellow: Left Turn/Stop Green: Right Turn/Stop Brown: Tail Blue: Reverse White: Ground Please note that however you wire the trailer side connector, the vehicle side connector will need to match it in order for the lights to function properly. If you don't already have a 5-way on the...
    view full answer...
  • Front Mount Hitch Recommendation for a 2019 Ram 1500 New Body Style
    For your 2019 Ram 1500 with the New Body Style I recommend the Curt Front Mount Trailer Hitch Receiver # C87FR because it features a hidden crosstube for a clean looking install. I was actually speaking with Curt about this fitting with tow hooks the other day and they said that the pickup cannot have tow hooks. If it does have tow hooks then they need to be removed. Attached is a photo of what this front mount hitch looks like installed as well as the installation instructions for you...
    view full answer...
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  • How Do I Connect My Reverse Lights To Work With A 4 Wire Plug
    I would recommend cutting off the 4 flat wiring that you already have present underneath and splicing in a five flat wiring set up # C58545. This will give you the reverse light function. Also you could attach a five flat to your trailer using # W002290.
    view full answer...
  • Adding Reverse Lights on Boat Trailer to Maintain Reverse Lockout on Coupler
    Let's work on getting some feeling back into your brain! I will break down the easiest solution for what you are wanting to do into two separate sections; your tow vehicle and the boat trailer. Starting on your tow vehicle, the easiest route to take is going to be to use a 4-Way to 5-Way adapter like the Tow Ready # 20036. This will plug right into the existing 4-Way to provide a 5-Way flat on the other end to match what you have on the trailer. The additional blue wire coming from the...
    view full answer...
  • Can You Flat Tow a 2017 Dodge Grand Caravan and What is Needed for Towing Behind an RV
    After doing some research and locating the owners manual for your 2017 Dodge Grand Caravan you are not able to flat tow this vehicle. According to the owners manual the options for towing this vehicle are to tow it on a trailer, so all 4 tires are off of the ground. Or you can use a tow dolly such as the Roadmaster Tow Dolly with Electric Brakes # RM-2050-1. This dolly has sliding ramps that adjust side-to-side from 34" to 77" to fit most vehicles. The dolly has a maximum weight capacity...
    view full answer...
  • 2021 Hyundai Palisade 5-Pole Flat Wiring Harness Recommendation
    There are a couple of different ways to do this. The first step would be to install a 4 pole trailer connector using part # CU94FR. I've linked to an installation video. The easiest way to proceed from there would be to use an adapter like # 20036. The extra blue wire on the vehicle side would tap into the circuit feeding one of the reverse lamps using the provided quick splice connector. This isn't my favorite, as you'll have an adapter that you'll need to keep track of but if you don't...
    view full answer...
  • Can 12 Volt Power Be Run With a 4 Flat Trailer Plug?
    Typically a 4 Flat plug will not have a lead that goes to a battery as the White wire is the Ground, The Yellow is Left Turn/Brake, Green in Right Turn/Brake, and Brown is Running Lights. If you were using this for a different application, you can technically use any of the wires to run to the battery, but I do recommend using the White as the Ground as this is the standard. If you are using this as trailer wiring, I recommend going a different way. The Deka Jacketed 6-Wire # DW04906-1...
    view full answer...
  • Wire Gauge of Curt 5-Pole Flat Vehicle Wiring Harness and Recommended 5-Flat Trailer Side Harness
    I reached out to the manufacturer, Curt, who let me know the Curt 5-Pole Flat Vehicle Wiring Harness with Mounting Bracket # C58545 used 16 gauge wire. This kit does include five quick splices to make connecting it easy. I have added a link to a video review for you to check out as well.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Ronnie R
Written by:
Ronnie R

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