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Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree connector fits into tight spaces.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Today on our 2016 Ford F-250 Super Duty, we're gonna be taking a look at and showing you how to install the Demco Fifth Wheel Gooseneck 90 degree wiring harness with seven pole plug. Part number DM8555002.This is what our seven pole wiring kit looks like when it's installed. This provides you with all the necessary lighting functions for your trailer, with your turn signals, running lights, brake lights, your grounds, your reverse lights, including brakes. This is what our wiring looks like when it's underneath the truck. You can see it has nice wiring to protect our wires, so it's gonna give you 10 foot of length to run from the bed of your truck, or wherever you decide to mount it, down to your existing seven pole plug.Typically you'd want to mount this as close to the tailgate as possible on your inside wall. Now, they have a tailgate extender, so I think he's gonna have trouble getting his cable plugged in there, so we're gonna move it up one to about right there.
So we want to make sure wherever you decide to mount it, that you look on the other side and don't drill all the way through the sidewall of your fender. Once you've got your mounting location, we're gonna drill a pilot hole. Once you've got your pilot hole drilled, you're gonna come back with a two inch hole saw bit.Next I'm gonna take a file and I'm gonna clean up my edges. Then you want to take some black paint or clear coat, and cover that bare metal up to help reduce the risk of any corrosion. Next we'll take our self taping screws that come in our kit in a quarter inch socket.
We're gonna mount our plug in place. Now that we've got that in, I'm gonna take the single side of my wiring harness, come up through the side of my bed, and I'm gonna plug it right into the back of that connection point.As you can see, I can't get my wiring harness onto the back of my plugs. What I'm gonna have to do is I'm gonna go back in the bed, I'm gonna loosen the bolts that I just put in so I can get that pulled in enough to install this. Slide this out. Once you've made the connection, you can reinstall your screws.
This is our seven pole on the back of our truck. What we need to do is I'm gonna have to pop this out of here so I can connect the other end of my wire that I just put on my bed to the back of this. There's gonna be two clamps on the back side here. So now we need to disconnect the plug here. Like that.
Pull this over, and that end's gonna connect into our plug running up to the back of our truck.Next we're gonna route our double end over to our seven way plug that was mounted on the back of the truck. You want to make sure you stay away from anything that's hot or moving so that the plug doesn't get damaged. And then one end of our plug's gonna plug in here. The other end's gonna plug into the four pole that was mounted here. Before we do that, I'm gonna add some Dielectric grease onto the connections. It'll help keep it from corroding if any moisture happens to get inside there. Push them together really quick.Next we'll take our extra wire loom and wiring. We're gonna roll it up, and we're gonna zip tie it right up here to all this existing wiring underneath the bed of the truck. Then we'll cut off our excess, clean up our install.Now using an alternate power source, we'll test our lighting. You can also just use a trailer. We'll start with our blinkers. Left blinker. Right blinker. Running lights. Brakes. That'll do it for a look at an installation on a Demco Gooseneck 90 Degree wiring harness with seven pole plug. Part number DM8555002 on our 2016 Ford F-250 Super Duty.
Average Customer Rating: 4.8 out of 5 stars (14 Customer Reviews)
Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree connector fits into tight spaces.Perfect fit. Arrived to me quickly. Thanks Paula at etrailer! 793091
Easy quick install and plenty of cable to run this to any location within the bed of your truck. i installed this in my New 2020 GMC 3500 Denali in less than 30 minutes!! Perfect fit as always from etrailer!! 775459
Good quality and fit 604649
directions are miss leading . 2" hole isn't big enough as another tab has been added which makes swinging the plug thru the hole impossible . I have a dremel tool at home and ground a tab area for the tab to go thru and was easy as pie then . Plug hook up easy and all was good after getting it thru the hole. 601859
good produst easy to install 601920
Easy install 597670
Bonjour, très bon produit, connexion fait pour mon camion et facile à installer. 574773
both products were shipped well packed and undamaged very impressed with the customer service and the shipping thanks again 492404
Gregory - 04/04/2019Wiring harness was easy to install and is holding up nicely a year and half later. Great product and price too from etrailer. 431775
While I had to wait for the product because of it was back ordered, the wait was not unreasonable and the etrailer staff keep me updated the whole time. The harness is high quality. Service was top notch. 365890
Works great. 352529
Good product fast shipping 327905
Have not yet installed, but a well built part with clear and concise installation instructions. Plug and Play! 309416
Charley S - 10/23/2017It is long enough, dose what I needed. Nice polite people to deal with. I got confuse when P.O. kept saying the cable cleared SLC P.O. and on way to me. Thank you and enjoyed doing business with you! Richard 246129
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