Wiring diagram 7 pin trailer plug ford2/12/2024 ![]() There is enough power wire in this kit to run from the vehicle rear and follow a factory wire harness that routes near the left rear wheel well ( must remove the long underside fiberboard black panel on the driver side). So Ford must leave the connection and the wire out of the harness to save money.Īfter seeing Ford's asinine logic to make life as difficult for the owner as possible, I decided to go back to the original plan of using Curt's brand wire harness for this vehicle. But only one side of the pocket had a female terminal for the fuse pins the second pocket did not have a female terminal, and I assume the wire was also missing. When I viewed the location in the fuse box (this is a double-layer fuse panel and is not one of Ford's better ideas because of the heavy wire cables going into it) and viewed the second fuse layer I found the #78 fuse position. ![]() The power to this module is protected by #78 fuse in the fuse box and the fuse box is under the engine hood. Our local public library has a subscription to Chilton's and Mitchell's manuals and after viewing both I found that Ford uses a trailer module that IS located and wired and mounted on the interior side of the wheel well and behind the trim panel. I used a volt meter and this connector has no power to the connector, even though it appeared like it would have power, and light connections. Removed the panel and I found a female plug that has 4 wires to it that have the same colors and the 4-flat trailer wiring connector. I did find behind the right wheel on the outside and underside of the vehicle a removable plastic panel. It turns out that there is no power connection that is running under the right rear side big trim panel on the interior. We'll want photos when you're finished with your project. One way or the other it's already in the cabin for you. Bottom line, don't angst about running a heavy wire all the way to the battery. I don't remember the color codes but ou'll find all the above info in the other thread posts. That connector already has trailer power running to the engine side of the connector. Under the carpet, about where a passengers right foot would go, there's a white connector. If no then you have to look a little further north. If yes then you're good to go, just connect your new harness to those wires. Now then, once you find the four pin connector behind the right rear tire check to see if one of the pins is hot when lights are on and another is hot when brakes are applied. You won't need the module but it's good to know where it is. There's a space behind the cargo area right side cover where a trailer towing module goes. That's where you can run a power wire if needed) to (this is the easy way) connecting to the existing wiring under the passenger rear tire. If you scour the other posts in this section of the forum you'll find some great wiring tips ranging from what you're trying to do (if you look under the hood at the driver's side firewall you'll see a huge grommet with wiring running through. I think you'll find you're over thinking this a little.
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