Trailer Wiring Harness Installation - 2014 GMC Acadia

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How to Install a Trailer Wiring Harness on a 2014 GMC Acadia


Speaker 1: Today on our 2014 GMC Acadia, we're gonna be taking a look at and showing you how to install the Curt T-Connector vehicle wiring harness for factory tow package, with a four pole flat trailer connector. Part number C56245.So here's what our wiring's gonna look like once we have it installed on our Acadia. It is gonna stay on the outside of the vehicle at all times. It's gonna provide us with a four pole flat trailer connector, which is gonna give us all of our lighting functions, such as our taillights, turn signals, and our stop lights.We're gonna have a dust cover to keep all the dirt and debris out. We can actually use it, also to attach our four pole to our hitch, that way it's not hanging down when we're driving down the road. Now as far as installing the harness it's gonna be an extremely straight forward installation.

If we follow our wire, it's gonna come right over to the passenger side, up behind the bumper, and we're gonna have a factory plug that's gonna plug into. Also, gonna have to put in a few relays and fuses, and those will be under the hood.So here's a look at what comes in our wiring kit. It's gonna come with our harness, a dust cover, and all the necessary fuses and relays to activate the wiring on our Acadia. This is gonna be a rather simple installation, all we're gonna have to do is find the factory plug to plug our harness into, and put the fuses and relays in place. Let's go ahead and do that now.To begin your installation you're gonna come all the way to the passenger side.

The very back, right by the muffler. If we come to the very edge of where our bumper is we're gonna wanna reach straight up, and in between the outer section of the bumper here and the frame, we're gonna have our factory plug. It's gonna be a little bit tough to see, but if we reach up in there we should be able to grab it. Now there is a little push pin fastener that it's attached to on the side. If you need to you can go ahead and pull it down, but we can make our connection without having to pull it down.The plug on our harness is gonna match the plug on our vehicle.

Before I plug it in I'm gonna put a little bit of dialectic grease inside the connector. That's just gonna help prevent any kind of moisture or corrosion from building up inside. We can take our connector and make sure that it's lined up and plug it into the factory harness.I'm gonna make sure it locks into place, just give it a gentle tug to make sure it is. Now we're gonna route our four pole wiring towards the center by our hitch. Just wanna make sure that you tie it up and secure it, so it's not gonna be too close to the exhaust here.I just found this plastic cover right here, I'll go around it, take one of my zip ties and secure my wiring.

I'm just gonna work my way towards the center making sure that I secure my wiring along the way.If we come over towards the center we have this bumper support here, I'm gonna go ahead and zip tie my wiring to that, going behind it. We can always go behind our hitch, secure it to our hitch, and then have it coming out right here on the driver's side.For our four pole end we have a couple different options of what we can do. I'm gonna take my dust cover and put it on the end here, just slip it over. Then I'm gonna use my dust cover to secure my four pole to my hitch. Now we have a draw tight hitch, so it has a built in bracket, so we do have the option to mount or four pole more permanently right here next to the receiver tube. If your hitch doesn't have the bracket built in, we do have a wide variety of mounting brackets as well as four pole brackets that you can install.Now with our wiring ran, we're gonna go and move under the hood and put our fuses and relays in place.Over on the passenger side under the hood is where our fuse box is gonna be. We're just gonna have two tabs on each end that we're gonna have to release so that we can get our fuse box up.If we just push down on the tab towards the bottom be able to release the clip, and our fuse panel will come off. Now we're gonna be looking for the fuses that we need to put in, and they're all gonna be labeled here on the cover, so we'll start with all of our ten amp fuses first.If we come to our fuse box towards the center we're gonna have this gray relay right here with an open spot for a fuse right next to it. That fuse is gonna be our trailer park lamp, so we can take our ten amp fuse, put one of them right there. Next, if we come to where our three black relays are here, right next to that we're gonna have an open spot, and right below that we're gonna have an open spot. Those two spots are for our left and stop, and our right and stop. We're gonna put one ten amp fuse in each spot.We're gonna have one more ten amp fuse, if we come towards the passenger side, should find a 20 amp fuse next to a gray relay right here. So we come to that spot right here, which should be labeled F8 if we look really close. That's gonna be for our trailer back up, we can take our last ten amp fuse and put it in that spot.Now we should two 30 amp fuses, so if we come towards the center we'll have this bundle of fuses right here. We'll find a 25 amp fuse. Right above those, towards the center, there'll be two open slot, this one right in front of it, it's gonna be for the trailer brakes, so we're gonna take our 30 amp fuse, put it in place. Then the one right above that is gonna be for our trailer power, so again we'll take one of our 30 amp fuses, should be the last one and put it in its spot.Now we're gonna have a couple relays we're gonna need to put in place. Towards the driver's side of the fuse panel we're gonna have two spots open between two factory relays here. Take one of our relays, put it in place. Then right next to that we're gonna put another one of our relays in. That should be all of the fuses and relays that we have to put in so we can go and test our wiring and make sure everything works. Just put our cover back in, make sure it locks into place.In our kit they do give you a couple extra fuses. We're gonna have a left over relay and a left over 30 amp fuse. But those are all the relays and fuses that we need to get in place.I'm gonna plug my four pole tester in. If you need one you can pick one up here at etrailer.com using part number I26. I'm gonna go ahead and run the lights and make sure that they're all functioning properly.If I turn on my headlights we can see they're working properly. As well as the left turn signal, the right turn signal, and the brakes. Now we can hook up to our trailer and hit the road.That'll finish up your look at the Curt T-Connector wiring harness for factory tow package, with a four pole flat trailer connector, part number C56245 on out 2014 GMC Acadia.


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Employee Dustin K
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Employee Jeff D
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