Uploaded September 2026 | Updated September 2026, 2 weeks ago
Click for more info and reviews of this Blue Ox Flat Tow Wiring Harness:
etrailer.com/Accessories-and-Parts/Blue-Ox/BLU44ER.html
Check out some similar Flat Tow Wiring Harness options:
etrailer.com/dept-pg-Accessories_and_Parts-sf-Flat_Tow_Wiring_Harness.aspx
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Full transcript: etrailer.com/tv-review-blue-ox-towed-vehicle-battery-charge-line-wiring-harness-blu44er.aspx
Hello, neighbors, it's Brad here from etrailer, and today we're going to be taking a look at the Blue Ox charge line for towed vehicles, which I think is a great addition to really any flat towed vehicle. So let's take a closer look at it. The Blue Ox charge line is going to be a great option for really any flat towed vehicle. Even if your vehicle's not actively using the battery, maybe for the braking system, a lot of times those batteries kind of stay active just even when the vehicle's in accessory mode to keep the steering wheel unlocked. Whatever it may be, there's nothing worse than getting to the campsite and going to go get some groceries in your flat towed vehicle and then the battery's dead. So adding a charge line is going to make sure that that's not going to be the case.
It's going to trickle charge your battery as you go down the road. And it's a pretty simple concept. There's a lot of different options out there, but this one has some features that make it really nice, and we're going to get it installed too. Today we're going to be installing it on a 2026 Wrangler, but the concept's going to be essentially the same on every vehicle. But it does come down to doing this at the same time as your diodes because this taps into our six-way, and that's how we get the power.
It's going to come from the seven-way on the RV, through the umbilical, and go through the charging point on the six-point, or on our six-pole, and eventually to the battery. And this little box here is going to let us know that it's all happening properly. Now this box is really going to just make sure everything's protected. It's going to protect against, you know, any temperature fluctuations, pulse width modulation. Either way, it's going to make sure that it's not going to cause any damage to the battery, but we also have the LED function that can change colors depending on what's going on.
So it's going to tell us if the battery is fully charged, if it's actively trickling, or if there's no charge. And we'll be hooking this up so we can see that function. But pretty simple here. It is labeled as far as where it all goes. So this is going to be 15 amps rated at 12 volts.
You do need to make sure that you have at least 13.3 volts coming from the RV, so you may need to check your plug to make sure that's the case. But generally, you're going to be fine. So what we have is a long cable here that says, "RV." Now it's not necessarily going to the RV. This is going to the six-pole that will connect to the RV. And something I'll say is this looks to be, oh, pretty close to 10 foot. And that's something I've ran into in previous charge line kits. They're pretty simple. It's essentially just a wire that goes to a circuit breaker. But a lot of times, you're getting pretty close to being short on wires and you do have to make those connections with the ring terminals. It's a little more custom fit. But many times I run short on wire. You're not going to have that issue on this one, which is great. So from there, we do have just the car side, and this is going to be going to the positive post on our battery and then the negative post to get our ground. So pretty simple overall. And to get this installed, you'll also see that there's two mounting tabs. So we'll be able to put this in a spot where we can see it actively to be able to see the diode or that light come on as necessary. But we do need to be close to the battery, so more than likely I'll have it kind of in this area. And then we're just going to run this up towards the front where we're going to be putting this on the six-pole. So I'll get this installed and show you how it looks. Now, while trying to get this mounted up, while we have plenty of wire to get to our six-pole, something that I noticed is these wires, theoretically, should be enough to reach both the positive and negative, which it can. But this kind of leaves me not really having a great spot to mount this. It does come with self-tappers. You could also double side adhesive this. And ideally, I want to get this to where we can see the LED pretty easily. But unfortunately, trying to mount it up on this fuse panel is just not going to allow me to get this ground to go all the way to the negative. And in the instructions, they say specifically to go to a ground on the battery. While there are a bunch of f
Click for more info and reviews of this Blue Ox Flat Tow Wiring Harness:
etrailer.com/Accessories-and-Parts/Blue-Ox/BLU44ER.html
Check out some similar Flat Tow Wiring Harness options:
etrailer.com/dept-pg-Accessories_and_Parts-sf-Flat_Tow_Wiring_Harness.aspx
etrailer.com
Don’t forget to subscribe!
youtube.com/user/etrailertv
Full transcript: etrailer.com/tv-review-blue-ox-towed-vehicle-battery-charge-line-wiring-harness-blu44er.aspx
Hello, neighbors, it's Brad here from etrailer, and today we're going to be taking a look at the Blue Ox charge line for towed vehicles, which I think is a great addition to really any flat towed vehicle. So let's take a closer look at it. The Blue Ox charge line is going to be a great option for really any flat towed vehicle. Even if your vehicle's not actively using the battery, maybe for the braking system, a lot of times those batteries kind of stay active just even when the vehicle's in accessory mode to keep the steering wheel unlocked. Whatever it may be, there's nothing worse than getting to the campsite and going to go get some groceries in your flat towed vehicle and then the battery's dead. So adding a charge line is going to make sure that that's not going to be the case.
It's going to trickle charge your battery as you go down the road. And it's a pretty simple concept. There's a lot of different options out there, but this one has some features that make it really nice, and we're going to get it installed too. Today we're going to be installing it on a 2026 Wrangler, but the concept's going to be essentially the same on every vehicle. But it does come down to doing this at the same time as your diodes because this taps into our six-way, and that's how we get the power.
It's going to come from the seven-way on the RV, through the umbilical, and go through the charging point on the six-point, or on our six-pole, and eventually to the battery. And this little box here is going to let us know that it's all happening properly. Now this box is really going to just make sure everything's protected. It's going to protect against, you know, any temperature fluctuations, pulse width modulation. Either way, it's going to make sure that it's not going to cause any damage to the battery, but we also have the LED function that can change colors depending on what's going on.
So it's going to tell us if the battery is fully charged, if it's actively trickling, or if there's no charge. And we'll be hooking this up so we can see that function. But pretty simple here. It is labeled as far as where it all goes. So this is going to be 15 amps rated at 12 volts.
You do need to make sure that you have at least 13.3 volts coming from the RV, so you may need to check your plug to make sure that's the case. But generally, you're going to be fine. So what we have is a long cable here that says, "RV." Now it's not necessarily going to the RV. This is going to the six-pole that will connect to the RV. And something I'll say is this looks to be, oh, pretty close to 10 foot. And that's something I've ran into in previous charge line kits. They're pretty simple. It's essentially just a wire that goes to a circuit breaker. But a lot of times, you're getting pretty close to being short on wires and you do have to make those connections with the ring terminals. It's a little more custom fit. But many times I run short on wire. You're not going to have that issue on this one, which is great. So from there, we do have just the car side, and this is going to be going to the positive post on our battery and then the negative post to get our ground. So pretty simple overall. And to get this installed, you'll also see that there's two mounting tabs. So we'll be able to put this in a spot where we can see it actively to be able to see the diode or that light come on as necessary. But we do need to be close to the battery, so more than likely I'll have it kind of in this area. And then we're just going to run this up towards the front where we're going to be putting this on the six-pole. So I'll get this installed and show you how it looks. Now, while trying to get this mounted up, while we have plenty of wire to get to our six-pole, something that I noticed is these wires, theoretically, should be enough to reach both the positive and negative, which it can. But this kind of leaves me not really having a great spot to mount this. It does come with self-tappers. You could also double side adhesive this. And ideally, I want to get this to where we can see the LED pretty easily. But unfortunately, trying to mount it up on this fuse panel is just not going to allow me to get this ground to go all the way to the negative. And in the instructions, they say specifically to go to a ground on the battery. While there are a bunch of f
