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Wiring a trailer doesn’t have to mean cutting into factory wires. The TowSmart Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connection plugs right into the existing vehicle wiring for a clean, straightforward install. Whether your vehicle has factory prep wiring or an existing compatible connection point, this plug-in harness helps get you trailer-ready without guesswork or splicing.
Switching between trailers with different connectors is easy with this setup. It gives you both a 7-way blade and a 4-flat plug in one housing. You can hook up trailers with electric brakes, auxiliary power, or basic lighting without needing extra adapters.
The plug-and-lead style design keeps wiring simple for anyone doing their own install. Each connector is clearly defined so you can route and secure the lead where it fits best. That means less time spent tracing wires and more confidence that your lights will work right.
As a direct vehicle-end connector, this harness forms a solid link between your vehicle’s wiring and your trailer. It’s designed for dependable performance on trailers using standard 4-flat or 7-blade electrical setups - ideal for towing safely and keeping all signal functions working as they should.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer. Let's take a quick look at this TowSmart multi-tow seven-way blade and four-way flat trailer connector. So this is gonna be compatible with your Ford GMC and Dodge trucks with the factory tow package. So this is basically going to be a plug and play harness that's going to add both a seven-way and a four-way connector, as you can see there. Now, the seven-way connector has a flap or cover here that's spring loaded. So that's going to close like that, and then you'll just push down the four-way just like that.
If you notice, we do have a like a little gasket in here on that seven-way to keep moisture out, and we have an enclosure right here on that four-way to keep that connector protected when it's not in use. So this is going to allow for a multiple trailer type to give you the ability, rather, to run multiple trailers, and this is going to be a very clean install. You're not gonna have to worry about splicing. This is gonna mount neatly near the hitch. It's gonna give you a reliable connection for those trailer lights and brakes, and some measurements might prove helpful for you.
So looking at what I'm calling the width here, we're sitting right about three and a half inches wide. The height about, let me come around and take a look here, say, right at three inches, it looks like, pretty close, tall. The thickness, right at about one and, let's call it one and seven-eighths inches or so. Now, if you happen to have any other questions about this, don't hesitate to reach out. We do want to make sure that you're getting exactly what you need, but very durable.
It's constructed of high density plastic. So it's gonna resist the elements that it's going to be constantly exposed to, but, again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Great prices
WASN'T PLUG AND PLAY AS I WAS LED TO BE LIEVE
Poorly made. The covers do not close because they hit the mounting bolts, which are not included. The covers are held in with a plastic clip that pops right out. I had to modify the covers and drill out the bolt holes to make it work. I was in a bind other wise I would have sent it back.
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Mike L.
3/17/2026
I'd be happy to help. Can you explain further? What's the year/make/model vehicle you have?