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57674 Curt Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps
Video of Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today, on our 2008 Kia Sorento, we'll be adding the adapter four-pole to seven-pole with test lamps, part number C57674. After this application, we'll only be connecting the ground running lights and turn signals. To begin our install, we'll first mount the seven-pole the bracket onto the seven-pole connector. We'll use the hardware provided with the seven-pole kit.Now, for this application, we'll only be using the four-pole connector, so were going to go ahead and fold under the extra wiring and tape it up to clean up our install look. Now, with that done, we'll go ahead and add the Draw Tite no-drill mounting bracket, part number 18136. Once secured, we'll attach the no-drill mounting bracket to the hitch using the worm clamp provided.Now, with that secured, we'll go ahead and route the seven-pole wiring up over the hitch and secure it to the fourth pole connector already on the vehicle.
Note, we'll also be using the Edelmann dielectric grease, part number 11755, in between the two four-pole connectors. This will assist keeping out any corrosion or moisture while still allowing the electrical current between the two connectors.Quick tech tip: I also like to take a zip tie and wrap it around the two four-pole connectors to secure them tightly together. Then we'll wrap them up with some black electrical tape to help keep out the dirt, dust, debris, and moisture. Now, with that done, we'll go ahead and use some extra-long black zip ties to secure the wiring to the hitch.Once its secure, we'll cut out the excess from the zip ties. This completes the install of the Curt Adapter Four-Pole to seven-pole with Test Lamps, part number C57674 in conjunction with using the Draw Tite no drill mounting bracket, part number 18136 and Edelmann dielectric grease, part number 11755 on our 2008 Kia Sorento..
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Average Customer Rating: 
4.7 out of 5 stars (22 Customer Reviews)
by: Access Const.03/17/2011
Is this review helpful?
2nd time purchasing from E-trailer, 1st time for this product, Pic shows 4 way attached to unit on left, does not come that way. 4 way is loose on the pig tail with a cap and slides into the meatl bracket. I see this will be a problem without securing it to the bracket better.9584
by: Richard S01/27/2011
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Built tuff, I like it. 6253
by: Jay G11/08/2011
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everything installed as intended and the led feature on plug is too great :}26708
by: jc10/05/2011
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Perfect in all respects! 25126
by: Capt Hal08/01/2011
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Easy to install and works perfectly. I like the LEDs showing the circuit status20733
by: Chris H.05/18/2013
Is this review helpful?
I really liked the idea of having the LEDs to let me know if I was having any problems with the wiring harness, but I did find a problem with it. I installed the wiring harness myself, using the instructions on the website, but after connecting everything I realized that the LED for 12v power is always on. It is not switched by the key, so although an LED should have low draw, this might not be a good idea on a work truck that stays parked for long stretches. 80885
by: Tim A.05/14/2013
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Awesome product. Was able to install the wiring in 10 minutes. Great product80198
by: Michael J05/06/2013
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Works well 79147
by: Norm M.04/30/2013
Is this review helpful?
My new Curt 4 pole to 7 pole and 4 pole adapter (C57674) with test lamps is a quality addition to compliment my Curt class III hitch. Attaching it to my '01 Blazer went smoothly, and testing to see that it was wired properly was a snap with the built in test lamps.78432
by: Eddy03/05/2013
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Great product! Sturdy and weather-proof connections and wires! Easily installed. Thanks Curt and etrailer.com for an awesome item!68991
by: Jeff02/24/2013
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Thank you so much for solving a wiring issue between a very old horse trailer and my tacoma pickup. Starting from the first phone call to the delivery of a part that fit perfect! Knowledgable staff, quick delivery and a good product. In a world filled with underachievement. I will say well done.67619
by: Brian02/18/2013
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Great Item and great Price!!!!!! 66836
by: Adam01/31/2013
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I need the ability to pull trailers with both 4 Pole and 7 Pole connections and this adapter did the trick. It's heavy duty and I think the extra few bucks for the Test Lamps was well worth it. 64739
by: BLS01/21/2013
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Very nice multi function adapter. The led indicator lights are very handy. Construction is of high quality.63671
Is the indicator light supposed to always stay on even when the car is turned off? My 12v indicator lights up red all the time even when I turn the car off.
comment by: Blake - 1/23/2013
If your 12V feed is wired so that it is hot all the time, then the 12V feed LED indicator will be on all the time. These are LEDs so the amperage draw is very small.
Patrick B - 2/4/2013 by: Michael Mower11/29/2012
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This hitch electronic adapter is exactly what I needed for my Toyota FJ Cruiser which cam with a factory installed class III 2" rear hitch and the 4 pole connector. THANK YOU ETrailer staff! Merry Merry Christmas60235
by: David Mabry09/25/2012
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I'm very pleased with this adapter. 55800
by: David09/04/2012
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good quality 53869
by: Chris M.07/24/2012
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1) Plug and Play, the wiring itself very easy to install. 2) I give it a "good rating" because of my gripe with this product. The 4 pole connector only connects to the bracket by sliding it on with its attached rubber housing. This is a loose, non-permanent fit and can easily be removed by hand. I'm not sure if it would slide off from vibration or not. I permanently fastened with a 2 part epoxy, but a rubber to metal connection, I am not sure how long that will hold. 3) The fastener that you will use to mount the bracket is not included. I bought two 1/4" x 3" bolts and drilled holes into my towbar. 4) I did not need the 3 wires with butt connectors, because they are only if you are installing with trailer brakes, so I capped those off with electrical tape. 5) Again, I gave it a "good" rating because of the 4 pole fastening issue I outlined.49131
by: Darin07/09/2012
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Well built, shipped timely, easy install. Loved the test lamps, makes it very easy to confirm the wiring is and remains setup properly. 4 way flat adapter makes switching between one trailer to another a snap.47198
by: Mickey G07/06/2012
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Great Product, very well made. Easy Installation. Would highly recommend this product.46915
by: Mike B05/01/2012
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The fit was perfect, did not require any modification to the unit or my vehicle. Took approximately 30 minutes, mainly because I was taking my time to make it look nice and I was using heat shrink connections. etrailer was outstanding in their support - as usual - and I received my package quickly.38887
by: Scott03/29/2012
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Easy to install, arrived on time. 35538
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