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Blue Ox Tow Bar Wiring Kit Installation - 2015 Ford C-Max

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How to Install the Blue Ox Tow Bar Wiring Kit on a 2015 Ford C-Max


Today on our 2015 Ford C-Max, we're going to be looking at and installing the Blue Ox Tow Bar Wiring Kit, Part Number BX8848. Now, we're going to go ahead and plug our six-pull into the car and our six- or seven-pull into the vehicle or the tester depending on what your vehicle has. Now we're going to test them. We'll try our tail lights. Try our right blinker and our left. We're going to start by removing our tail lights. We'll start by removing these plastic panels.

There's one on each side. Inside there's two plastic nuts, like wing nuts. We're just going to loosen those up. That's what your wing nut's going to look like. There's two of them on each light.

Simply take a plastic panel tool and pry it back. There's a little snap tab on the end. Sometimes there a little difficult to get out. Just remove the light. There's a clip here.

It's got a little tab on it, you push that in and pull it out. Set your light to the side. Now, we're going to repeat on the other side. Now, let's go ahead and test and see where our brake wire is, off, on. All right. On our car it's going to be the purple one, the second one over.

Now we'll test for the tail lamp, off, on. All right. That's going to be the first position, and that is going to be purple with a green tracer. We're going to strip back our coating. Careful not to cut yourself. I'm going to strip back a couple inches so you can get to the wires. Then we're going to do our tail light signal first. Cut the wire back. With these smaller wires it's easier to double them over before you put your connector on. These are supplied connectors. Slide that in there, crimp. Do the same thing for this side, crimp. Give it a tug. Your single side of your diode is going to go towards your light. You're going to snap that in and you snap the other side on one of these. The other one is going to be our wire that goes to the front of the car that ties into your motor home. Your going to do your brake signal the same way. Cut your wire. This one's a little thicker so you shouldn't have to double it up. Do the same thing. The side towards the bulb is going to get the one connector. Next, we're going to take the four-wire that's going to run to the front of the car. We're going to bring it in from the outside. Then there's two, a green and a brown wire, that are separate. We're going to run in through the outside, too. Feed them through the back. The brown and the green wire are going to be your jumpers that go to other side of the car on your passenger side to tie into your lights. Once, you have them inside you'll take your yellow, which would be your brake and turn signal. You're going to put a connector on that. That's going to go to your purple wire on this application. You'd check on yours to make sure they're all the same. Snap that onto the back side. Basically, what you're doing is you're stopping any power from the RV coming inside and back feeding into your car. That's the diode inside here. I'm going to do the same thing with the brown wire. Your brown wire is going to also to tie into the brown wire that goes to the other side of the car because they're on the same circuit. We're going to go ahead and cut this back a little bit. Strip these. Next, you're going to take your brown wire from your two separate wires that are going to jump to the other side. That brown wire and the brown wire out of the four flat wire. Put those two together. Take a straight butt connector, crimp that. You're going to put one single wire coming out of there. Then, we'll put our spade connector on. Now, it's going to go to the back side of the other diode. Now, we're going to tie our two greens together, the one that's going to jump from the driver side to the passenger side and the one that comes from the four flat wiring that's going to go to front of the car. We're going to butt-connect those two together. One last thing you do on this side is there's a ground wire which is going to be the white. You're going to pull it back through the hole. Put a ring connector on it, crimp it. We're going to go ahead and put a sheet metal screw into the body. That will ground your system. Now, we're going to go ahead and tape up our wiring. Just kind of tape it all together so you don't have anything flopping around inside the wheel well of the car. Be sure and leave this clip on here because we're going to snap this back into the body so the wire's away from your seat belt. We'll go ahead and push it back through the hole, and we'll leave the pigtail out. Now, we're going to take the wires we had pulled out, and we're going to route them down between the body and the fascia. They'll just drop out on the bottom. Then I took a piece of tubing and stuck it down in there. I'll tape it on, and we can pull it through. You're also going to pull the two wires that are going to jump across to the passenger side tail light, be your green and your brown. It's going to be necessary to put a little notch in the bottom side of the light, so you want to peel back your foam. We're going to cut a little groove in here with our rotary tool. Be sure to put the foam back on it so it helps it seal. This will give us a little access for our wires to pass through. You want to put it on the bottom side so any water that comes in here can't get in now. Now, we'll simply place this back on the car. We'll plug it in and set our wires to the side. You're going to reinstall both of your nuts on the back of your tail light. Simply snug them down. You're going to snap your wire clip back into the hole to keep it away from your seat belt. You want to make sure and tuck all your wires up out of the way. Push them back into the hole. After you have that in there and it's away from everything, you're going to snap your trim cover back on, and that side is finished. We're going to repeat it on the other side. Now that we're at the bottom we have our wires pulled. You have your four flat wire so we're going to wire this to the front of the car then your two wires are going to jump across to the passenger side tail light. We'll simply route them up across and we'll zip-tie them into place. It may be necessary to a couple of holes in the plastic under-bumper lining, just to put your zip ties through. Make sure you have nothing on the inside, and this one's clear. You simply put a couple of small holes and go across. We'll do the same thing on the other side. Push your zip tie through the hole, and you're going to wrap it around your wire. Repeat that on your other hole. Once you have your ties in place, simply trim off the excess. We'll go ahead and do that to all of them so you have nothing dangling around. I'm on the passenger side. We simply stuck that piece of tubing back down between the bumper, and we're going to attach it to the wires and pull them up. On our application, it was necessary to lengthen the wires so we simply spliced on a couple of longer wires. We'll fish them up and we're going to place them inside the car. On the passenger side, we'll only have two wire going through and there actually is a rubber grommet here that's not used so we'll pop that out and simply take your side cutters. Cut a little X in the back of there. Feed your wire through. Install your grommet and you can take a little bit of electrical tape to hold it out of the way so it's not going to be caught in anything. Now, we're going to attach this one the same way. We'll have the green will go to your brake and turn signal and the brown will go your tail lights. On our application, the wires are the same color on both sides so our solid purple is going to be our brake and turn signal. The purple with the green tracer is going to be the tail lights. We'll go ahead and attach our wire to the tail light circuit. We're going to go ahead and cut this wire, strip it back. Install our spade connector. Now, it's going to go to the single side, the outside of our diode. We're going to take our brown wire, trim it back. It's on our connector. That's going to go to one of the inside on your diode. The other one will be the spade on the brown wire that jumps across. That will go to the other side. We'll repeat that process for the turn signal and brake light with the green wire. Then we're going to go ahead and tape up this side. You want to make sure you tie everything together so it's not flopping around in the pocket here. Make sure when you push it back in you reattach your wire connectors so it keeps the wire away from the seat belts. You're simply going to push this back through and out the hole. Then we'll take our tail light, plug it in. Snap it back into position. You'll take your two plastic nuts and secure it from the backside. Now that we have the wiring and the tail lights back in, we're going to go ahead and route our four flat wire to the front of the car. We'll simply follow the factory wiring harnesses or any lines that run to the front of the car, keeping it away from any kind of heat source or moving parts. We have our wire now. It's all attached and zip-tied along the frame route 00:11:58. We just ran it along up over top of the suspension components, not where it's going to touch anything that moves. Then, we went down and we followed the e-brake cable and routed it underneath this panel. You just want to keep it away from any kind of heat sources and any place it can drag along the ground. Then, we went up and we followed the firewall, making sure we tied it as we went. It comes out at the top side right next to where on a normal vehicle with a battery would be located. On this one there's just a power box. You can see our wire followed the firewall and it comes up. We've got it zip-tied there. We're going to leave a nice little coil here so we can tie into our braking system. Then, we're going to run the rest of it. We'll follow it down. It'll come out. Then, we're going to attach it to our, in this case, we're going to use a six-way and we'll wire that out. Now, that we have our wire run, down here we're going to use our six-way connector. We're going to use the Blue Ox 6-Pole, Round Pin Trailer Connector, Part Number BX294-0902. We're going to want to cut our length off a little bit. We're not going to need so much coming out of here. We'll separate the wires. Simply snip in between there. You just want to separate them back a couple inches. Okay, you'll strip them back about quarter of an inch on all of them. You want to make sure you slip this protective cover up. Slip it to the back so when we're all done that's going to slide down and cover up our wiring. Then, we'll put some tape around the outside there to give it some protection and keep the corrosion and dirt out. Okay, on the back of our plug it will be marked GR. It's going to be our ground. That will be the white wire. Twist that and we'll stick that into the ground and simply tighten it up. The brown is going to go into the one marked TM, which is your tail lights. We'll go to our left turn signal it's going to be our yellow. The last one where going to have is the red. Now, your wires are all attached. Go ahead and slip that cover on. Just take a little bit of electrical tape. Go around the outside just to seal out all the dirt and debris. We'll pull back the little access we have there and we'll attach this with your supplied self-tapping screws. That's your plug in its finished location right next to your break-away. That's going to wrap up our install of the Blue Ox Tow Bar Wiring Kit, part number BX8848, on our 2015 Ford C-Max.


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Employee Jeff D
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Employee Joshua S
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