Tow Ready Tail Light Isolating Diode System Installation - 2019 Ram 1500

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How to Install a Tow Ready Tail Light Isolating Diode System on a 2019 Ram 1500


Hi there Ram owners. Today in your 2019 Ram 1500, we're going to be taking a look at and showing you how to install Tow Ready's diode wiring kit.Your diode wiring kit is one of five main components you're going to need to flat tow your vehicle behind your motor home. In addition to your diode wiring, you're also going to need your base plate, which is the connection point on your vehicle to connect it to your motor home, your tow bar, which provides a connection between your base plate and your motor home, your safety cables, which is your supplemental connection in addition to your tow bar, and your supplemental braking system, which allows the vehicle's brakes to apply when you hit the brakes in your motor home to help you come to a safe stop.Your diode wiring's going to to take all the lighting signals from your motor home and transfer those back to the lights here at the back of your vehicle. This way people behind you will know your intentions going down the road, keeping you safe, as well as keeping you DOT compliant in all states. It does this by installing diodes behind your tail light assembly, which allows the motor home signals to be tapped into those diodes so the circuitry can extend up here to your light, illuminating it. But it can't backfeed into the rest of your vehicle systems because that diode acts as a one way check file for electricity.This is a nice kit because it's integrated all together in the harness.

You don't have to take a bunch of diodes and put them together like some other ones, it's just all together. And it's installed permanently on your vehicle, so once you put it on, you never have to mess with it again. It's just there. And you don't even see it, because it's behind your tail light assembly.There are some other options out there to achieve lights at the back of your vehicle, such as magnetic lights. But those are not permanent, so you have to set them up every time you want to use them.

You got to run the wire down the side or through the inside, however you've decided to route it. With this, it's just a permanent installation. You're wiring's right underneath where you can't ever see it, and you've got a connector at the front where you can connect it up to your motor home.This kit does go to a 4-way connector at the front, but what you see here is a 6-way connector, as we've opted to change it to that due to the ability to add additional accessories when flat towing. Your 6-way connector's going to be your most common, however the 4-pole is all you need to get lighting working. You can pick up a Roadmaster connector like we've got here, if you want to go ahead and upgrade it to that 6-pole connector so you can have further enhancements for your flat tow setup in the future.As far as diode wiring kits, I find this to be one of the easier kits out there due to the way everything's integrated and the way it comes with spade terminals to make all of your connections, so that way everything just plugs in place.

And if you ever wanted to take it out, you can plug those wiring right back into each other for your factory wiring. And it's almost as if you never even put it on. Let's go over the installation together now so you can have the confidence do it at home.We'll begin our installation by removing both the passenger and driver's side tail light assemblies. To do this, there are two bolts you'll need to remove using a T25 Torx socket. Lower down your tailgate and you can access these bolts on the inner portion where the tailgate was resting.And then located next to those bolts, you're going to find a clip.

There's going to be one clip next to each bolt. Use a trim panel tool or a flat blade screwdriver to pop out the center of the clip. And then you can remove the rest of the clip. We can then remove our tail light assembly by pulling rearward, and then disconnecting the electrical connector on the back by pushing the red tab to unlock it, and you can press down on the release pin there. And then separate the connector. You can now set your tail light assembly aside and repeat this same process on the other side to remove the other tail light assembly.We're now on our driver's side. We've taken our new harness, and we just fed it up through the bottom here in the opening. You can see right down below, it's really easy to just stick your arm down in there and just pass this up. Now on the driver's side, you want to make sure you feed up the harness that has the box with a yellow and a brown wire on it. And I've already gone ahead and cut the wires that we're going to need to tap into. They're going to be the two here on the corner. One of them is going to be white with a gray stripe, and the other is going to be just a solid white wire. I've already got it connected.The solid white wire, that is our brake signal for our turn and brake, which is going to connect to the yellow wire. All we did was attach the spade terminals to the appropriate wire. On the side closest to the connector here, we're going to put the male spade terminals, like I did here. And on the other end of our harness, we're going to put female spade terminals. Those then just simply plug right into the yellow wires on your control box.And we're going to go ahead and connect the other set now, which goes to the brown wire, which is our white with gray wire. The spade terminals are already pre-attached to our brown wire, just like they we're on our yellow. So we will need to attach the other ends here, so we're going to strip those back. And then just like we did on the yellow, we're going to put a male spade terminal on the connector side, and a female spade terminal on your harness side.Slide your spade terminal over your wire, crimp it down. We're going to repeat that for the other side, but we're using the opposite style of spade connector. And it's done this way so that way you really don't have any way of plugging it in backwards, because it's only going to plug into your box one way. And I like the way that they did it this way, because if you ever want to take this out, you just unplug them. And then since one's a male and one's a female, to go back to factory, you just simply plug these two together.We're going to go ahead and plug our brown harness into it now. So our male end goes into our female, and this is going to be labeled the input side on your box down there. And then your output side, it's going to have the female spade on the brown wire. It's going to connect to the male spade that we crimped on.Now that we've got this side all connected, we're going to feed up the box on the passenger side and we're going to make the exact same connections. Let's head over there now and I'll show you the wires that we tapped into on that side.We're now over here on our passenger side. We tapped into the white wire with the green stripe located in the corner and the white wire with the orange stripe. And this is in the same location, as far as the corner, as your driver's side was. We cut those wires, and then we took the brown wire and we put that in between our white and orange wire, and we put the green wire in between the white and green wire. Your spade terminals are going to connect the exact same way, so you're going to have male on the connector sides for these wires and female on the harness side of your two wires that you cut.We can now clean our wiring up. So we're going to take the excess here and we're just going to bundle it up. And I like to zip tie it right to that factory harness. We're going to leave some excess here on our control box side, because that is going to zip tie, because that is going to use the double-sided tape on the back to secure it, to keep it up from rattling around and making a bunch of noise. And then peel off the adhesive backing, and attach the module behind the tail light assembly.Here underneath, you can see your harness. You've got your 4-pole that's kind of here towards the center. Ours is off a little bit to the driver's side. And then this is the wiring that goes off to our driver's side tail light assembly, and our passenger side tail light assembly going that way. We just went ahead and stayed above the hitch to keep the wiring from sagging down. Coming off of your 4-pole connector here in the middle, you'll notice you also have a white wire with a ring terminal on it. This is our ground wire, and this just needs to be connected to ground. We're going to use the included self-tapping screw, and we're just going to run it into the bottom of the frame, probably at about this location. It doesn't really matter. Feed that through to the frame and run it right in.We can now take the long 4-pole extension that comes in our kit and we're going to plug it into the harness that we have here at the back. And then we're going to route the rest of this harness here to the front of the vehicle, where it's going to make our connection to our motor home, or be converted over to a different style connector, such as a 6-pole connector. I'm going to route that wire now, and then I'll show you the path that I took to get it there.We routed our wiring, following our factory wiring down the driver's side frame rail. We stayed above our spare tire, zip tying it along the way. There's a bracket here we just went ahead and zip tied it to. Stayed above our rear suspension. And then we came down next to our fuel tank. From there, we stayed next to the fuel tank, going all the way forward to the front of the fuel tank. And from here we followed our factory hoses here, just zip tying it to the brackets along the way.Once we got up to the front cross brace here, before we hit our exhaust we go ahead and go up and over the frame. And then we follow factory wiring located just on the outside of the frame. Once you reach your front suspension on the driver's side, we actually go back over the frame again to the inside. And from here it basically just comes forward right over this front cross member. And we've just got it hanging out here, because this is going to be the slight variation point, depending on how you're going to be using your system. If you're just going to be using it for your lights, your 4-pole connector here is going to be fine. So you can mount it to a bracket at the front. But our customer's decided to upgrade his to a 6-pole connector, because you can add additional accessories to that type of connection, so we're going to be cutting this off and mounting it to our 6-pole connector.We're using Roadmaster's 6-pole connector due to the extra pins that will allow us to add accessories, such as a charge line kit. Or for some of your braking systems you have a monitor wire that needs to be run from the vehicle up to the front of the motor home, and this is a nice clean way to get that monitor circuit also run into your motor home.And that completes our installation of Tow Ready's diode wiring kit on our 2019 Ram 1500.


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Video by:
Joshua S
Video by:
Kathleen M
Video by:
Jonathan Y
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Installed by:
Cole B
Test Fit:
Brent H
Test Fit:
Shane H
Test Fit:
Robert C
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David F

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