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Trailer Wiring Harness Installation - 2018 Ram 2500

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How to Install a Trailer Wiring Harness on a 2018 Ram 2500


Speaker 1: Today in our 2018 RAM 2500, we're going to be installing at Bargman fifth wheel goose neck 90 degree wiring harness, part number 50-97-410. It's a nine foot insulated cable with a 90 degree connector that's going to run down over to your factory trailer connector.It provides all your necessary connections at a convenient location. It's got a door to keep out any debris and moisture. The door has labels for all of your connection points. It mounts cleanly right to the side of your bed. This can be mounted in any location where there's ample room on the side of your truck bed.

This runs in line with your factory seven way connector, so you have a connection point in your truck bed and at your bumper. It's easy to install. Let's show you that now.To begin we need to find a suitable location to mount our 90 degree connector. We're going to be putting ours right here. Before you put your connector anywhere you want to make sure that there's no components behind it that you're going to drill into.

We've already checked this location and there's nothing back there. There is a reinforcement plate about right here. That won't effect our drilling process as we've got enough room to make our incision to slide our harness through. We're going to have to do some precise markings though so that way we don't end up having to drill into that reinforcement to get our cable through. It's okay that we're going to be putting our self taps into that reinforcement however.

Let's go ahead and mark this now so we know where to drill.We're going to go ahead and use the outside as a template. As you can see here, our reinforcement's about here. That's only going to effect our self tappers. So we're putting our hole slightly lower than the top line and in the center of these two lines. So we'll go ahead and measure that now.So we'll make our mark for our center and one and a half.

We want to be slightly lower as our harness isn't centered. It's about three inches there, so we're going to make our mark at about an inch and a quarter. Now that we've got our location marked out, go ahead and use your center punch to ping that location. Now we can drill it out.We're going to want to drill to one quarter inch for our pilot hole for our two inch hole saw. Go ahead and mark your drilling location and use a little spray lubricant to help the drilling process go faster. It's easier on your bit. Now we've got our two inch hole saw. We're going to use our quarter inch hole we just drilled as our pilot hole. Go ahead and mark it. Now if you do contact the reinforcement behind it, it's just going to be the edge so you can continue on through and just cut that off as well.After you're done drill your hole, it's a good idea to take a nice round file., you can use a flat one but a rounded edge will work better, to clean off any burs. This way it will also make it so it's not as sharp so you reduce the chance of cutting yourself when installing your component. Now you can spray a little bit of alcohol on a rag and use that to wipe up the paint marks we made earlier and to clean off any of that lubrication that sprayed on it while drilling. Now you can take some cardboard or paper, make a little template, and spray over what you just cut to prevent any rust or corrosion in the future.Now we're going to feed our wiring down through the hole that we just made. Be careful when putting it in that you don't cut it. The filing we did earlier will help reduce any incisions that it might make on the wires. Now you want to check that your seven pole connector will fit flush against the wall. If it ends up hitting the outside inner fender, a spacer is included that will move it out so that way it can be installed like this. We're not going to be using the spacer however, because we're not contacting our inner fender wall.Now we're going to mount our connector so go ahead and line it up. There are self-tapping screws included in the kit. We're going to make some three thirty seconds inch pilot holes to make sure it's accurate and that the screws stay sturdy without causing any damage to the sheet metal. Go ahead and make your marks. Now go ahead and ping all your holes. Now go ahead and drill all your pilot holes. While our pilot hole is drilled and line everything up and we're going to install our self tapping screws.Now that we've got that fully installed, we can go back with the alcohol on a rag and again clean off anything that's left. Now we've gone ahead and removed the spare tire. That'll make it a little bit easier to run your wire. However, it's not necessary. It will also make it easier to see on camera how we're going to route this wire.Now we've got our wire down here. We're going to go up and over our frame. Now that we've gotten our wire on over to our seven way connector, we can go ahead and unplug our factory connector. Just push in on the tab here at the top right and pull outward. Now we're going to take the female end of our wiring harness. We're going to put some dielectric grease and fill up inside of our holes there. That'll keep out any moisture to prevent future corrosion. Once you've got that packed full of grease, you can go ahead and plug it in right where you unplugged your factory connector. We're going to take our factory connector and we're going to do the same. Pack it full of dielectric grease and plug it into the male end of our harness. Your factory connector does have a mounting pushpin and there's a bracket right here next to where your seven way is. So we can go ahead and plug that right into there to hold it out of the way.Now that we've got everything installed, we just need to tidy up our wiring. If you can, route it right along next to factory wiring. That way you know it's going to be out of the way and safe. Now we went ahead and just zip tied it right next to our factory harness here. The zip ties aren't included in your kit, but you can pick up some here at etrailer.com.With everything fully installed, let's test it out. Plug in our seven way tester here. Now with everything installed, we've got our tester in place. We've got our left turn, our right turn, tail lamps, brake lamps, reverse lamps and trailer brakes. That completes our installation of the Bargman fifth wheel gooseneck 90 degree wiring harness on our 2018 RAM 2500.


Info for this part was:

Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Randy B
Test Fit:
Randy B
Employee Brent H
Test Fit:
Brent H
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G
Employee Zach D
Video by:
Zach D
Employee Jonathan Y
Video by:
Jonathan Y
Employee Jacob H
Video by:
Jacob H

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