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 6 pole round plug and 4 pole flat. Additional wire leads for brake and an accessory.
Note: The white wire must be grounded to the vehicle frame. The other two wires can be tied up if they are not going to be used.
47175 & 37175 Hopkins Wiring Adapter
Video of Adapter 4 Pole to 6 Pole and 4 Pole Trailer Wiring Adapter
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today on this 2008 Chevrolet Express we are going to install part number 37175 from Hopkins. What this is is a 4-pole to 6-pole and 4-pole adapter. It will install on the existing 4-pole that is on the vehicle and convert it. The first thing we are going to do is tidy up the wires. We are just going to use some electric tape to secure everything together. While we are at it, we will go ahead and show you the functions of the wires. First off we will cover the function of the wires. This is the 4-pole itself and this will plug in to the 4-pole that is already existing on the vehicle. The white wire is the ground and that will get connected to the frame. And then we have the red and blue wires. Traditionally, blue is for brakes. However, on this particular 6-pole, the blue wire is ran to the center pin. So a lot of times the outside pin is going to be for brakes. It just depends on how your trailer is wired up. The red wire here is typically used for a hot lead. However, this is run to the outside pin. So you can actually use either one of these for the hot lead for 12 volts or brake lead, depending on how your trailer is wired up. On this install, we are actually not going to be using these. We are just going to use the 6-pole for lights only. 1:09
OK, here we are all finished. Let us go ahead and set this to the side and go ahead and install the bracket on to the bumper of the vehicle. We are going to take our bracket and install it right on the bottom edge of the bumper. We are going to use a set of vice grips to go ahead and just clamp it into place. Get it straight with the hitch. Alright, then we will go ahead and use some self-tapping screws to go ahead and attach it. Now we will go ahead and install our wire harness. Push it into place and then attach it with the existing hardware. Now we are going to take the 4-pole that is already installed on the vehicle and we will plug these two together. Now it is a good idea to use some dielectric grease to help protect the contacts. This will end up being a permanent connection when it is all done. And then we will thread a zip-tie around it. Now our two other ends that are not going to be used, we will just cover those with electric tape as well so they will be safe for future use. OK, now we will take our white wire. What I think we will do is just go ahead and push it inside of the frame. And then we will actually attach it to the bottom of the frame behind the hitch. We will go ahead and zip-tie our wires to take up the excess slack. There is a nice little hole in the frame here, so we will use that. Alright, with that that finishes our install. One other thing you might want to do is go ahead and test it with a light tester and make sure everything is functioning. And then try it on your trailer. And that will finish it for part number 37175 from Hopkins.
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Average Customer Rating: 
5.0 out of 5 stars (9 Customer Reviews)
by: Richard C.09/11/2011
Is this review helpful?
This kit was an excellent addition to the general hookup kit as it provides wiring options for different trailers and is very simple to install, including excellent instructions. I highly recommend this kit.23725
by: Chad c08/19/2011
Is this review helpful?
Adapted straight across. Installed this morning and is solid. Description doesn't mention it does include install plate. Great order and service. 22320
by: Mike Espie05/10/2012
Is this review helpful?
Again very easy to install. Took all of about 10 minutes to get it hooked up and working.39815
by: John T04/30/2012
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This is my second purchase from ETrailer. The product I ordered shipped out on time and arrived in good condition. The folks at ETrailer set me out a shipping tracker and notifcation.....very helpful! I would recommend ETrailer to anyone looking for trailer parts or accesories. Products are high quality and prices are great! Keep up the good work!38796
by: Darryl O02/28/2012
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great product 32725
by: Carl D02/27/2012
Is this review helpful?
I installed this on an aftermarket replacement bumper I bought after someone collided with my factory bumper (thank you very much whoever you were). Installation was a snap into the pre-drilled hole in the bumper. Just used some dielectric grease on the contacts, wrapped with electric tape, zip-tied to secure, and did a quick tap into the frame for the ground. 32596
by: Lyle Kryger12/28/2011
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It was very easy to install and hook up. The company is quick to ship the items I orrdered so I am very pleased.28824
by: Robert B.06/14/2011
Is this review helpful?
quick shipping. great product 16928
by: Emmanuel G.04/27/2009
Is this review helpful?
Great product! Easy install.1794
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