Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Adapter converts from 4 pole wiring on vehicle to 7 pole round plug and 4 pole flat. Additional wire leads for brake, power and accessory.
Wire Functions:
White: Ground
Blue: Brake
Black: "Hot" Lead - 12V power supply
Purple: Aux. - Reverse Lights etc.
Hopkins # 47185B, TAP # 37185
Video of Adapter 4 Pole to 7 Pole and 4 Pole
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today on the 2000 Chevrolet Silverado, we're going to install Part #39510 from Tekonsha. This is a Voyager brake controller. The first step is actually put a connector on the back of the truck. The part we're going to use to do that will be 37185. The brake controller and adapter cable also come in the package, Part #39510-3025-p. Now, we'll start off by installing the bracket onto the bumper.
Then go ahead and attach the seven pull connector to the bracket. Okay, with the seven pull connector installed, we can go ahead and start hooking up our wires. We'll take the four pull end and connect it to existing four pulls on the vehicle. We'll hook in the four pull wire connectors together, we'll apply some and I'll let you grease and then use a zip tight to hold everything together and wrap it up with some electrical tape, that way it will make permanent connection out of it. Then we'll take the black and blue wires or we're going to connect them up to a cable that we're going to run up to the junction box underneath the hood.
The part # for the cable would be 10-2-1. We hook up our gray cable to the black and the blue wires can melt the seven pull connector, we're going to match it black to black and then white to blue. Then we'll go ahead and take the purple wire and hook up to reverse size circuit that's on the vehicle and that would be the light green wire which is located inside the harness behind the four pull wire. We'll take a right wire with a ring terminal and ground it to the frame. We'll tape everything together, keep everything nice and neat and then we'll continue on with the gray cable and run it up to the junction box underneath the hood.
Going to your gray cable, run it to the frame and make sure we don't hit anything that's hot like the exhaust or anything moving like these winching components. Next, we need to remove this bracket in the corner, we need to take off the cover for our junction box to get to wires underneath. Remove the bracket with this four bolts then we can unsnap the cover. We'll go ahead and take the bar hold up from the engine compartment and ran it up to the junction box. Underneath the cover, you can see that we have two wires, the blue wire and the red wire.
Now, the blue wire will go to the output from our brake controller, we'll take a white wire and connect that up to the blue wire. We'll cut an existing connector and use a bulk connector. Right next to it is a red wire that's use for power supply to the brake controller or an existing unused stud is right next to it. We'll use the 8mm nut with a 1.5 inch tread pitch to secure a cable to the post. Now, we'll take our remaining black wire in the cable, it will run up to the post on the other side of a junction box. Now, that will be use to install the black wire to the power supply will be a 6mm nut by 1.0 tread pitch. After you attached your black wire to that post, we need to install a fuse. Now we will be using 30 amperes in this slot right here. That will give us power to the wire and we'll be good to go. All we got to do is re-install the covers and the bracket and then we'll get our attention to the brake controller and install on the inside of the vehicle. Now, I'm going to go ahead and install the brake controller. First of all, you pop it from the junction boxes to the inside towards the left underneath the dash and there will be three sockets on the very top. You want to install our adapter cable for brake controller from the second one from the left. Now with Part #3025-p, we'll plug the adapt cord in and then re-install the cap. Now, we'll leave a wire loose and we'll go ahead and knot up the brake controller. First we'll attach the bracket to the dash and we'll make sure that's in a straight line with the vehicle. Before we install a brake controller on the bracket, we'll also take the time out to pre-drill the holes in inside the brake controller body that way we either start everything together once we install it to the bracket. Then we'll attach our brake controller to the bracket and we'll also connect our wires up at the same time. Okay, with our brake controllers installed, we'll go ahead and take a moment to zip tight our wires up. Once they're secured, we can go ahead and put our trailer to it and check the operation. Okay, looks like we have a green LED so that tells us that as we see our trailer back there and it's ready to work. Deploy it to manual override and just you all put and you can tell by the colors from there goes some green to yellow to orange to red. With that that will finish our install of Part # 39510 from Tekonsha, the Voyager brake controller on a 2000 Chevrolet pickup.
Customers compare 37185 to these similar products
Customers Who Purchased This Wiring Also Bought...
Average Customer Rating: 
4.8 out of 5 stars (82 Customer Reviews)
by: terry m.01/06/2011
Is this review helpful?
weak bracket plug itself is OK. bracket to attach to bumper/frame seems a little flimsy. Haven't had problem yet, just seems a little lacking in strength.5090
by: Dan J.06/20/2011
Is this review helpful?
Quality product - Easy to install - Etrailer install video very helpful.17420
by: Brandon Z.03/28/2011
Is this review helpful?
Wires could be a bit longer. Mounting hardware is not galvanized nor stainless, anticipating rusted nuts and bolts soon.10568
by: Trubee K.01/20/2012
Is this review helpful?
Item 37815 was easy to install. It took me only about 20 minutes in 20 degree weather--on my back in the driveway to complete including drilling holes for the bracket. I plan on using the trailer tow items to pull a double axle car trailer. Although I am very mechanically inclined, your videos and articles made the job a breeze. Your customer service and e-mail support were also excellent. You have an excellent selection of items that appear to be av ailable with no delay. I would recommend your company to anyone with confidence.30036
by: Americo01/20/2011
Is this review helpful?
eaxctly what i was looking for 5767
by: Jeremy01/23/2012
Is this review helpful?
This thing rocks! Was easy to install in the housing and is made of solid materials.30160
by: Todd N.01/08/2012
Is this review helpful?
This adapter did the trick. Easy to install and well made! A great price. Thanks eTrailer.com!29326
by: Joe12/28/2011
Is this review helpful?
I ordered this item and was told I would have it within a week. I was very surprized to see it the next day! I will be sure to order from etrailer again. Thanks28805
by: Bill Vohnoutka12/20/2011
Is this review helpful?
Worked great! 28321
by: Keith D10/30/2011
Is this review helpful?
Standard adapter, nothing exceptional. Appears to be well made.26352
by: Mike F10/15/2011
Is this review helpful?
Nice for the price. Oem connector style without the pricetag of oem. 25608
by: Mike K09/01/2011
Is this review helpful?
Just exactly what I needed, super fast delivery, ahead of the tracking info. Looks of high quality, so no worries about preformance.23352
by: Robert D07/12/2011
Is this review helpful?
Excellent Product. Arrived very fast I was impressed. I Cant wait to install!!!!19300
by: al meintel05/17/2011
Is this review helpful?
I order a connection by using their recomended links and got what I needed very quickly.14480
by: Chad C03/18/2011
Is this review helpful?
Very nice. I bought 2 of these and they have the mounting bracket and everything. One of them was perfect, the other had the wrong hardware. There are 4 bolts that mount the unit to the bracket, and the head are small so they recess into the 4 holes in the plastic, but I did not get the right ones in one order. That's okay, I can go buy hardware.9775
by: Wesley H.01/18/2011
Is this review helpful?
Great Service This is a great place to shop. Got my parts fast and it had good instructions for installing the parts. I will be back to shop again5628
by: g baker03/07/2009
Is this review helpful?
worth the money spent easy to install, worth the money spent to get it done right the first time. thanks etrailer 1627
by: Red C.05/20/2013
Is this review helpful?
I use this matching unit to replace the broken cover(plug lock) parts & spring on my hard wired connection. It's a good product unless/until the plastic hinge breaks(especially if one backs into something). It's less costly to strip/swap parts than a new plug + rewiring. Just wish they made a metal version, or could get select "parts". 81184
by: Randy Herrington05/16/2013
Is this review helpful?
Shipping was prompt and product was exc ellent80531
by: Jacob H.05/02/2013
Is this review helpful?
The pictures available on this site made choosing and ordering the right items so much more satisfying. I didn't have to worry about the wrong items coming to me and then modifying them to fit my purposes. If I ever need more trailer supplies (which is very likely), I will definitely come back to etrailer.com for my needs.78690
by: Ross S05/01/2013
Is this review helpful?
The product was exactly as advertised and took 10 minutes to install.78529
by: Jim03/29/2013
Is this review helpful?
could not ask for more 73328
by: Mike03/29/2013
Is this review helpful?
It went on like a perfect fit on my 2008 fj cruiser73183
by: Tom03/27/2013
Is this review helpful?
The product itself is very well made. The 4-pin connector is molded into the product and very sturdy. The 7-pin connector is held closed by a spring and has a foam gasket to keep water out. The 4-pin wiring is only about a foot long, and the additional 7-pin wiring is a bit longer. I do not have a brake controller (but do borrow a trailer with the 7-pin wiring), so I removed those wires. I also hard-wired all the connections, so I can't speak to the quality of the 4-pin vehicle connector. The mounting bracket is thin steel, which worked well for me, as I had to bend the mounting plate to make it work for my installation. The paint on the mounting plate appears to be high quality as I bent the plate and banged it around quite a bit during install and did not nick the paint. The plate is drilled so that is can be mounted with the 7-pin hinge facing up, down, left or right. The hardware is zinc coated, so it should hold up well to the weather. I went ahead and replaced it with SS to make sure. I also replaced the standard nuts with SS nylon lock nuts to make sure nothing would back out due to vibration. If you plan on using the supplied hardware, I would strongly suggest Loctite on the mounting nuts. I installed this on a CX-5 with hitch # 87623, wiring adapter # C56011 and hitch cover # I-728. Over all a very clean installation. The connector is completely hidden inside the bumper, but easily accessible. 72768
by: Theodore03/26/2013
Is this review helpful?
Simple and easy to install. 72627
by: Fred03/22/2013
Is this review helpful?
LOOKS JUST FINE THANKS WILL INSTALL IN A FEW MONTHS71975
by: Jeff T03/20/2013
Is this review helpful?
Excellent Product. Very easy to install and I am a Contractor not a mechanic.71656
by: greg03/15/2013
Is this review helpful?
Great product! Well made, perfectly fits my application. Great for switching a vehicle from 4 to 7 pin configuration. Fast shipping, excellent company!70837
by: greg03/15/2013
Is this review helpful?
Great product! Well made, perfectly fits my application. Great for switching a vehicle from 4 to 7 pin configuration. Fast shipping, excellent company!70818
by: Joe03/05/2013
Is this review helpful?
What a great product. etrailer was the only place that I could find this. I am glad I got to their sight .68968
by: Thomas03/03/2013
Is this review helpful?
Seems to be a very good product super far shipping!68493
by: Hershel03/02/2013
Is this review helpful?
easy install 68462
by: Juan02/22/2013
Is this review helpful?
Everything was EXCELLENT the survives E verything.67457
by: James02/06/2013
Is this review helpful?
High Quality, Fast shipping I have done business with befor and I came back. Thats the best referance I can give.65164
by: joseph02/01/2013
Is this review helpful?
very pleased product & shiping thanks will shop here again64815
by: Allen01/25/2013
Is this review helpful?
Very fast shipping... Great product. 64156
by: John01/21/2013
Is this review helpful?
Just what I need to tow an RV trailer. Also has a four flat connector. Very easy to install on the 18136 bracket.63719
by: Gary M12/31/2012
Is this review helpful?
Exactly what I expected it to be and it was delivered very promptly62287
by: Doug O12/17/2012
Is this review helpful?
Just what i needed. I want to thank Pat for the help she gave me. I have told others about the service I got with your company. Thanks61614
by: Alan J.11/28/2012
Is this review helpful?
I am pleased to inform the E- trailer team that my first experience with E-Trailer will certainly not be my last. Good job E- Trailer. Getting my order out the door so fast barely gave me time to watch the relevant videos. Alan J. Moody, ME60170
by: Chris P11/22/2012
Is this review helpful?
After taking my new SUV to the dealer to have it wired to tow my camp trailer, I was told it couldn't be done. They refused to see that the vehicle had the tow package and to help me get the last few critical pieces to tow. I guess they were too busy! So I tried a reputable RV shop that I have worked with before and they quoted me over $400 to custom wire my SUV. I knew there had to be a better option. Looked online and found etrailer. They made it sound easy. I purchased: Tekonsha PowerTrac Electronic Brake Controller (39523), Tekonsha wiring adapter (3035P) and 4 pole to 4 & 7 pole adapter (37185). It all arrived quickly and after following the instructions online and even with average mechanical skills, I was good to go in about one hour. Saved about $300 and whipped it out that fast. Why consider any other option. I am extremely satisfied.59917
by: Nick A.11/10/2012
Is this review helpful?
Great product. Works great. Provides the additional capabilities I need.59148
by: Adam C10/30/2012
Is this review helpful?
Ordered on a Sunday, arrived on a Thursday. Fit my Jeep Grand Cherokee like a charm. Easy to install. I just welded the bracket to my hitch. 58417
by: Paul10/18/2012
Is this review helpful?
Good product and only took few minutes to install...57506
by: TJ10/11/2012
Is this review helpful?
Quality: good Description: excellent Instruction poor (none) Shipping: very fast (delivered in 2 days) Good product, if you know how to hook up, you will have no problems. All ends are pre-terminated and ready to go. Overall a great product.56947
by: H Lee09/24/2012
Is this review helpful?
Easy to install 55697
by: Dave L09/21/2012
Is this review helpful?
was easy to put on vehicle and customer service was very helpful55466
by: Pete Y.09/20/2012
Is this review helpful?
have used this before on my other truck...a big time saver indeed!55290
by: Bob G.09/15/2012
Is this review helpful?
installed, thanks 54810
by: Howard L09/15/2012
Is this review helpful?
Great product & service 54770
by: Dan B09/13/2012
Is this review helpful?
Easy to install, works great. 54562
by: tim f08/03/2012
Is this review helpful?
Easy installation, already used it and it works great!50490
by: Buddy J07/23/2012
Is this review helpful?
Neat product! Get the flat 4-pole and 7-pole on one bulkhead connector with simple plug and crimp connections. Easy to install, ready to use. Great to replace old or create a new trailer connection for your vehicle.49099
by: Troy Flair07/09/2012
Is this review helpful?
Great product and very easy to wire and install.47197
by: Clay T07/08/2012
Is this review helpful?
Having both connections is great! Very useful.47144
by: kenny jean07/05/2012
Is this review helpful?
great products fast shipping 46767
by: Seth S07/01/2012
Is this review helpful?
Great product, recommend watching video twice, had it hooked up in about five minutes46395
by: Joe06/13/2012
Is this review helpful?
Not finished with install yet, but looks straight forward.43972
by: Andrew06/11/2012
Is this review helpful?
Very nice hookup point. great instructions and easy install. Thanks.43770
by: Joe B06/11/2012
Is this review helpful?
This is the second time I have ordered trailer parts from etrailer.com. In both instances the parts were shipped and received in only a few days. Further the website videos were also very helpful in understanding how to get the parts properly installed. I would recommend etrailer for their quality of parts and timeliness.43722
by: Rodney M.06/11/2012
Is this review helpful?
I assembled and installed plug adapter and it was a very clean install. I am happy with the product.43634
by: Jon C. WA State05/22/2012
Is this review helpful?
Got my part at a reasonable price and installed all in the same day. But what really impressed me was a year ago when I installed my trailer brake controler and my SIlverado was suppose to have a OEM tow package..., wrong answer. It had only had trailer lights. So with the help of etrailer and a few emails and the right parts, I got everything installed and have been impressed ever since.41317
by: JBK05/07/2012
Is this review helpful?
Received product quickly, product is well made and easy to hook up39675
by: Brian P05/01/2012
Is this review helpful?
Excellent product! Customers like having both plugs in one housing! I would recommend for ANY application that requires a 4 way and 7 way.38939
by: Harry O04/05/2012
Is this review helpful?
It is exactly what I expected. No surprises, easy to install.36233
by: Michael B.03/29/2012
Is this review helpful?
Most people are skeptical about ordering online, however, etrailer is a company that has gone above and beyond most. From the intial phone call to the follow up contact. Price was inline with most, packaged arrived as promised along with visual map tracking, and online video made installation a breeze. I bought the hitch and wiring for my Volvo XC90 and would HIGHLY recommend etrailer to anyone! I will definetly use etrailer again in the future35482
by: Joe W Ratajczak03/20/2012
Is this review helpful?
Just what I needed, but I am not installing it. Just planning on using it when I need to hook up my seven pin plug and then dis-connecting it. But if I wanted to mount it to my car, your video on the Ford Explorer couldn't make it any clearer. Great job. The installation would probably take about as long as it does to watch the video.34490
by: Jay M.03/11/2012
Is this review helpful?
no problems what so ever 33559
by: vic03/11/2012
Is this review helpful?
Excellent quality. fast shipping 33551
by: Shane02/26/2012
Is this review helpful?
Hassle free installation of this product on my Honda Pilot.32585
by: Pete02/22/2012
Is this review helpful?
Looks good--Easy to install 32239
by: Helmut02/14/2012
Is this review helpful?
should come with wiring information 31819
by: Craig R02/13/2012
Is this review helpful?
Great combonation plug. 31687
by: Phillips,A02/10/2012
Is this review helpful?
Great Product installs quickly. 31414
by: Rod K09/17/2011
Is this review helpful?
Did not work, The aluminum (Not Brass) connectors are week and on mine were not properly bent so no connection was made to the trailer.24146
by: John S04/26/2011
Is this review helpful?
Easy hook up on a 99 Tahoe. I like the dual use without the need for adapters etc. Perfect add on..12394
by: Rob M.08/08/2012
Is this review helpful?
The adapter is just what I was looking for a worked perfect. only too about 40 minutes to install.50995
by: Ricky Talkington10/10/2011
Is this review helpful?
Just what I ordered.............and fast service.25379
by: Rob P.09/15/2011
Is this review helpful?
Very easy to install Great product. 24016
by: Michael Hall05/16/2011
Is this review helpful?
This litterally took 3 minutes to install. I didn't need the supplied bracket as my hitch dad a mount already on it from the factory.14155
by: tony t.03/18/2011
Is this review helpful?
grate product easy to work with e trailer is excellent to buy from 9663
by: Boomy11/19/2010
Is this review helpful?
Trailer Plug for 2008 Ram 1500 Fast Easy install. Heavy guage, quality wire. Fits right into the OEM opening in my 2008 Ram 15003680
Ask the Experts about this Hopkins Wiring
Related Products...
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.
