Mighty Cord 5th Wheel and Gooseneck Wiring Harness Installation - 2018 Chevrolet Silverado 2500

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How to Install the Mighty Cord 5th Wheel and Gooseneck Wiring Harness on a 2018 Chevrolet Silverado


Shane: Hi, I'm Shane with etrailer.Com. Today I'm going to walk through how to install mighty cord gooseneck fifth wheel wiring harness on your 2018 Chevrolet Silverado 2500. Adding an in bed wiring kit to your vehicle is going to make it a lot easier when hooking up to your gooseneck or fifth wheel. To plug your wiring in here, you're not going to have to hang it over top of your tailgate and plug it in down by your bumper. Now the nice thing about it is, not only are we going to be able to use the seven pole plug inside the bed, but we're going to be able to maintain the use of our factory plug on our bumper. We're going to have a spring loaded lid.

It help keeps the lid close and keeps our connections secured from any dirt and debris. On the underside of the lid we're going to have a foam ring, and what that foam ring does, it seals right around this edge, again, gives it a nice good seal keeping any dirt and debris from getting inside on your connections.Another nice thing about our lid, we're going to have a nice easy grab handle to open it when we need it. We're also going to have a tab right here, and what this tab does is when you put your wiring in, this tab actually locks your wiring in place to keep from the wiring accidentally pulling out when you're pulling your trailer down the road. And it's going to give you a 10 foot of cable or 10 foot of cord, so it gives you plenty of room to mount your plug in different location inside the bed of your truck. As far as the installation goes, it's very simple.

You have to drill a small hole here, you route your wire down, you plug it directly into the factory plug on the back of your vehicle. So very simple to install. With all that being said, let's go ahead and walk through the installation together.To begin our installation, we need to determine where we're going to mount our plug in the bed of our truck. I'm going to mount this one just a little bit higher. And what I like to do is this stake pocket, there's a plate that runs about here.

We're going to go just below that. We're going to use a hole saw bit. The directions are going to say two inch, I will say with a two inch hole saw bit you're going to have to get this wiring fed down down through the hole. This plug right here is going to be very hard to get in that two inch hole. You can go up to a two and an eighth and kind of squeeze it in there.

If you go up to a two and a quarter, you'll still have plenty of room when mounting your plug that your holes are not going to interfere with that hole. So it'll make it a little bit easier when getting these installed or pushing these through the hole.So how I have here, drill bit. Two and a quarter inch hole saw bit. I'm going to center it. Once you get your whole drilled, take a file, kind of knock off the burs around the edge so it doesn't damage your wiring. Go ahead and take some paint and spray that bare metal to reduce the risk of any rust or corrosion later on. Now we'll take our two ends that are together. We're going to run them down like this. In your kit you're going to get some self tapping screws. Get it straightened out. Now what we need to do is we need to route our wiring over to our factory wiring. What I did is went over top of the frame rail. Keep in mind your spare tire's got to go up here, right over to the back of my plug here. I'm going to take some dielectric grease. If you don't have any, you can find it here at etrailer.com. It's just going to help keep moisture or anything like that from corroding your connections.Go ahead and put it on our plug. Now we'll remove our factory plug. You simply pull off the gray tab here, push on this black tab, and then you'll pull out. We'll take the short end from our new one. Install it just like that. And we'll take our longer end, put some dielectric grease onto your factory plug, and we'll put these two together. Go ahead once you got them together, lock your gray tab in place. Now we can take our wiring and clean it up, get it all zip tied up out of the way where it's safe. Now with an alternate power source we're going to test out our wiring. Left turn, right turn, brake lights, running lights. Now that we've tested it, we know everything's working correctly. We're ready to hook up to our trailer and hit the road. Again, I'm Shane with etrailer.com. I hope this video has helped you, whether you're still deciding or installing mighty cord fifth wheel gooseneck wiring harness on your 2018 Chevrolet Silverado 2500.


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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Zach D
Video Edited:
Zach D
Employee Dustin K
Video by:
Dustin K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Jacob H
Video by:
Jacob H
Employee Shane H
Test Fit:
Shane H
Employee David F
Test Fit:
David F
Employee Clayton O
Test Fit:
Clayton O

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