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Pollak 7-Pole, RV-Style Trailer Wiring Harness Installation - 2000 Chevrolet Silverado

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How to Install the Pollak 7-Pole, RV-Style Trailer Wiring Harness on a 2000 Chevrolet Silverado


Rob: Hey everybody. Rob here at etrailer.com. Today, we're going to be taking a look at the Pollak 7-way trailer connector on our 2000 Chevrolet Silverado. Now here's what our trailer connector's going to look like. It's going to provide us a 7-Way at the back of our truck so we can have all the required lights to get down the road with our trailer. It's going to give us our clearance lights, our turn signals, our brake lights, and even our backup lights.

Now, depending on the way your Silverado was equipped, it may or may not have a 7-Way on the back. Now it also may or may not have a tow package wiring that's in there. Typically, the trucks will have at least your lighting functions at the back, but in our case, ours only had the lighting functions. There was no 12-volt power source in the back, and there was no brake output wire, and those can be added easily later on to this 7-Way So you can put a brake controller and have a power source back here, but the way our truck came equipped, it didn't have those.So right now we're only running our lights through our 7-Way and like most 7-Ways it is going to have a spring loaded door on it. So we're not going to have to worry about closing it and keeping all that dirt and debris out because the door will close on its own and keep all that moisture and debris out of the connector inside.

Now, there's also a nice little weatherstripping and so when it does close, it kind of seals it up and we don't have to worry about rain getting in there and building up corrosion.Now, although that door and that gasket is going to help keep out that moisture, debris, and everything else, what is really nice is that the plug here uses a plug on the back of it. So if there was a lot of dirt, debris, or even corrosion building up on either side, we can remove this socket and replace that separately without having to do any kind of rewiring because each side is available independently. So if one side gets messed up, we don't have to replace the entire units. But now that we've seen what our 7-Way looks like mounted back here and gone over some of the features, let's go over the installation process and show you where we found our wires in our Silverado and how to hook them up to our 7-Way.The first step of our installation is going to be find the factory wiring that's on our truck. Now, typically it's going to be above the spare tire somewhere, and it should just have blunt cut wires on there.

We went in and pulled some of the slack down, but you're looking for a bundle of wires that looks about like this. Now there's also a couple of clips that are holding the wire in place, but if you can get it down far enough to work with you don't need to pull all those wires down. I going to go ahead and take a pair of cutters, and I'm going to cut the ends of each one of these wires and cut off this little bit of heat shrink that's on there so we can have all individual wires to work with.Now, usually there is a legend for the wiring. Sometimes it will be taped on the loom or might be here on the end, telling you what each color wire's function is. However, with the truck being as old as it is that sticker probably wore off.

And even if it was there, it might not be visible. So I'll go ahead and go over the functions of each color wire, what they should be, so we know how to hook up our 7-Way. The dark green wire, that's going to be our right turn signal. The white wire is going to be our ground. The yellow wire is going to be our left turn and brake signal. Now the light green wire is going to be our backup signal. The Brown wire is going to be our taillight signal. And then this blue wire finally is going to be through the center, high Mount stop lamp. So if you have a camper shell or anything like that, this wire can be used to wire in that third brake light, but we're not going to be using it in our application.Now that we have our wire separated, I'm going to go ahead and strip back the ends of them. But since we're not using this blue wire, I'm just going to leave it alone and I'll cap it off or tape it off so we don't have that exposed wire in there.We'll just strip back the ends of our wire. So then we want to grab our new harness. I went ahead and stripped back all the wires except for the black and blue one because again, we're not going to be using those in our application. Now we can just use the included butt connectors to start connecting our wires together. However, I'm going to be replacing these ones with some heat-shrink butt connectors, just cause these are going to give a little bit better protection, make sure any water doesn't get inside and build up corrosion. Well, we'll go ahead and start on the harness end. Let's take our butt connector, slide it over one of our wires. In this case, we'll start with our white wire, which is the ground wire first and crimp our connector in place.And then on the truck's side, we'll take our other white wire and we'll connect it into that butt connector. Now, most of these are going to hook up color for color, but again, when we went over the functions on the truck side, that's how we need to hook them up. So we want to make sure that we're getting the correct signal back to our 7-Way. On the truck side, if we find the yellow wire, that's going to be our left turn signal and brake light coming from the truck. However, this is not going to get hooked into the yellow wire on the harness side. This is going to go to the red wire. We're going to connect the two like that with another butt connector, but I'm going to go ahead and finish hooking all these up. And then we can go through all the functions and show you exactly how each one hooks up to each other.So once you have your wires hooked up, it should look like this. Brown wire coming from the truck should hook to thebrown wire on our harness. The light green wire should hook to the yellow wire on the harness. The dark green wire should hook to the dark green wire on the harness. The yellow wire from the truck should go to the red wire and then finally the white wire to the white wire. Now, since these are heat-shrink butt connectors, we use a heat gun to shrink them down. If you're using an open flame, like a torch or a lighter, be extremely careful not to burn or char the wires or the connectors themselves.Now this step really isn't necessary, but I like to protect the wires with some electrical tape. So I'll just take the whole bundle and start wrapping everything with some electrical tape till it's completely covered. It'll just help protect it a little bit since it is on the outside, underneath the truck.So now we need to find a spot to mount our plug. Now, if you notice, we have plenty of room or you might think you have room just to put your bracket just about anywhere, but we need to make sure that we have enough clearance out of the back of the bracket so that we can get the plug and socket plugged in. So right here really wouldn't be a good spot because we wouldn't have the cross tube of our hitch, right in a way. So you really want to keep that in mind when you're positioning your bracket of where you want to put it Because you have to be able to plug everything in and give yourself enough slack to get it there. But we've got a really solid piece of metal right here at the back of the bumper. So we just plug it in once we find a spot that'll clear everything and look the way we want it to.So I'm just going to take a little bit of time, find a nice flat spot we can connect our bracket too. And then I'll use the included self-tapping screws to screw directly to the bumper. Let's get one of them started. Once they are loosely started, I can kind of play with the angle and the position of it, Get it nice and secure. Then I can put the other one in place.I'm going to route my wire so it's going over the hitch and I'll take my plug, and I'm going to plug it into the socket before I mount it, just because it is rather close to the hitch here. You'll have room to mount it, but as you can see, it'd be pretty snug trying to get that in there to get it to click in place, so I like to just get it mounted up first. And then we'll mount the plug to the bracket itself. You can take one of the screws, make sure it goes through the plug and the bracket. And we'll take one of these lock nuts and secure it on the back side. I have a total of four of these, so let's go around the outside edge of the plug and secure everything down. Just getting it loosely in place for now so I don't have to worry about it moving around on us.I'm just going to take a flat blade screwdriver, and I'm going to hold the nut with my finger cause it's actually a locking nut. So it shouldn't spin on you. You should be able to get it nice and snug, tighten down the screw. If you're having a little bit of trouble, nut on the back starting to spin on you, you can either use a three ACE or a 10 millimeter socket to hold it snug. But again, there are locking nuts, so it should hold itself still.Now we can take some time. We'll go ahead and take all this excess wire and I'm going to tuck it up and tie it up above the spare tire. That way it's not going to interfere if we ever have to take it down or put it back up, but it's also not going to be hanging down below the bumper, potentially catching on anything when we're driving down the road. I'm just going to take some zip ties, coil everything up and tie it as high as I can above everything. So it will be out of the way. Go above that spare tire cross-member we can tie it to either the cross-member itself or all this existing wiring that's already up there.Now the final step of our wiring is going to be testing it and making sure all the functions that we wired up work properly. Now I'm using my tester. You can use your trailer. However, I recommend using some kind of tester. That way, if there is a problem, you can isolate it to the truck rather than having to figure out if it's your truck or trailer, but I'm going to go ahead and run through the lines. That way I can verify that they're all working properly. So we can see that my clearance lights are working as well as the left turn signal, the right turn signal, my brakes and my backup lights. All we have left do now is hook up to our trailer and hit the road, but that'll finish up your installation and you'll look at the Pollak 7-way trailer connector on our 2000 Chevrolet Silverado.


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video by:
Kathleen M
Employee Aidan B
Video by:
Aidan B
Employee Shane T
Test Fit:
Shane T
Employee Robert C
Test Fit:
Robert C

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