Mighty Cord Trailer Connector Adapter Installation - 2013 Thor ACE Motorhome

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How to Install a Mighty Cord Trailer Connector Adapter on a 2013 Thor ACE Motorhome


This motor home came stock with a four-pole flat, which is great for your lights and everything, and maybe a small trailer. But if you've got a motor home, chances are you'll be pulling your car with a flat tow set up. This four-pole, you can do it, but it's not really the optimal way to do it. We'll show you how to upgrade this to a seven-pole connector, which will makes things a lot better.Today, in this 2013 Thor Ace we're going to review and install the Mighty Cord trailer connector adapter. This is our connector from Mighty Cord here. It has a conventional seven-pole connector on the inside, very popular industry standard for many years.

Comes out back. It's going to adapt down to a four-pole connector, which will plug into your four-pole connector on your motor home.This is what the seven-pole looks like once installed in the back of our motor home. You can see it was a fit. We got it sitting up right below the bumper where it fits nice and looks like it's part of the original tow package.Now, a couple of things I want to point out. First off, the seven-way connector, it even says it on the lid.

Look inside. It's got the very common six blades and then the center pin. This is the industry standard to fit all kinds of seven-pole connectors from your trailer, like this one, even though a bit worn out.Quick look at the lid. So we've got plenty of room. It's spring-loaded to help keep it down into place and keep your connector from falling back out.This has a classic durable plastic construction so it lasts a very long time.

You don't have to worry about the metal galvanized versions that still end up rusting out on you. So this is a good match for your vehicle.Next, I'll go ahead and show you how to install it, plus a couple of extra pointers for extra circuits along the way.Now, our seven-pole connector is not going to hold itself up, so we need some extra parts. We'll need our no-drill long bracket here. This is actually clamped to our hitch to help hold it in place. Also, from Mighty Cord we also have a seven-pole connector that fits a wide variety of seven-pole connectors.As you can see, a little piece is already attached to it.

The only modification is I put a slight bend into it. So I put it up on my hitch. It comes down at an angle and clears the bottom of our bumper. Now, our bracket's held in place by a clamp. So it goes through the opening here and around our hitch. Make sure the screw is pointing down to the ground. Makes it a little bit easier to run it together. Push back up. This will engage the threads, and then we can tighten it down.Let's put our seven-bolt into place. We're going to just thread our wires through. We'll connect our lights here. Push them together. Now, I did put a light layer of dielectric grease on the pins here to help protect it because once we put it together, this'll be a semi-permanent connection. It's also a good idea to run a zip tie around it to make sure it doesn't ever come apart again. I'm going to simply run a zip tie between the wires here to keep everything steady. That'll be more than enough.Let's mount this up to our bracket here. Now, this does not come with the hardware. I wish it did, but it does not come with hardware to install it. Put a conventional pan head screw, flat washer, lock washer, and that will be more than adequate for the bracket here. With all our hardware in place, we'll just go ahead and snug them down.For our customer's application, we're not going to require the use of these two wires. So we're not going to worry about them, and we will be using the blue wire here. Now, since I'm making an electrical connection that's going to be outside of the vehicle and especially underneath, I'd like to use a regular heat-treated butt connector that'll seal everything out instead of these conventional ones that are on here. So I'll just go ahead and just cut it and replace it.The other two wires, this can be used, the black, for a trailer or a towed vehicle, for a duel power supply to charge a battery or run an accessory on a trailer. For the yellow wire, on a trailer side only, this is typically used for a reverse light or maybe an auxiliary circuit for some other reason on your towed vehicle.Now, our customer is going to be using the blue wire here for a notification system from his towed vehicle. We'll be using this circuit that's used in the factory tow package on the brake wire that goes up front underneath the dash.Now, we have to get underneath the motor home here and get access to the wiring that's on the passenger side of the frame. Here's a wire harness going towards the back. There's a big connector and a small connector. We want access to the bigger connector here. So this wire harness, we're going to follow it down.I took this apart earlier and actually found some labels for the wire harness here. I got lucky, and it says there used to be a flag here for brake output. So what I did is use another heat-treated butt connector and connect your 10-gauge wire, and I ran it down to my four-pole connector. This way you can run this signal all the way from the front to the back, and you don't have to worry about running an extra wire going up towards the front in the cab of your motor home.Here is the wire that I extended, and it's going right to our blue wire here. We'll apply some heat to it to shrink it up. The last hookup will be a white wire for ground, and that's going to go into some sheet metal right behind the bumper here. This place right behind the bumper will do just fine. So using a self-tapping screw . Once again, it doesn't come with those connectors; you have to supply that on your own. We'll run it in.All right, just about done. We'll tidy up our wires a little bit, kind of organize them, and we'll zip tie them into place. With everything connected, we'll go ahead and try it out. I've got a nice little tester for this, but you could also use your trailer or your towed vehicle for this.This inaudible 00:06:19 lights. First off, we'll do our running light circuit, left-turn signal, our right-turn signal, and we'll double check the brake signal. Now I've finished for the Mighty Cord trailer connector adapter on this 2013 Thor Ace.


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Info for this part was:

Test Fit:
Joe V
Installed by:
Jeff D
Installed by:
David F
Video by:
Dustin K
Video Edited:
Chris R

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