How to Wire a 7 Pin Trailer Plug (Vehicle Side)

Trailer wiring can be one of the most intimidating components of your towing setup, but it doesn't have to be. Most of us aren't electricians, but that doesn't mean wiring a trailer is beyond us! We'll walk you through the vehicle-side wiring process for 7-pin plugs, so you can get your trailer up and running in no time.

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[alexursu]

Can we just stop and appreciate that this channel has 61 THOUSAND videos uploaded!? That’s insane. Just today there was like 300 uploaded, how is that even possible.

Kudos to the determination lol. Also good video haha.

[jasonchristopher]

Where is the video showing the wiring from the front of vehicle? I need to start fresh.

[jimaugie]

This video should have been named 'how to REPLACE' a 7pin plug.

[rdavidrahn]

At about 1:40 into this video, you mention a video about wiring from scratch. I looked for it but can't find it. Can you post direct link to that specific video?

[nelsondunn]

Excellent video, short to the point and very informative, thanks 😊

[jeffl]

where is the vid to wire it from scratch??? I just used a pre existing plug on a new used truck i just purchased. A 2000 freightliner fld120. My issue is that everything works but it has no brake lights. Everything on the truck works fine and I ran a test light on the ground at the pre existing plug and it seems fine. Blinkers work fine but no brake lights. Cant figure it out.

[videos]

You have 1, 000, 000 videos, why not add the url link to the viseo discription of the video where you mention wirongnfrom scratch?

[mateocarlos]

What I find confusing is when a blue wire is for "brakes". But, the brakes use the left and right turn signal wires, and I think a higher voltage on that wire, brightens the output of the bulb when you hit the brakes. So, what does the "stop" wire do? Is that for electric brakes, and the signal causes the brakes to engage?

[TravisTetrault]

where can I Find the plug combo kit that has all wires on one end I've been researching it and cant find a single one

[davidodom]

Need to update your video description. The link for shopping 7-way...doesn't work.

[tysonl]

What harness are you using in this video? It's exactly what I need to replace my old damaged 7 way, but I can't find it on the website and there's no link in the description.

[casual-og]

If you use a 4 flat to 7 blade adapter, do the brakes, backup light, and 12 volt work, or are you missing out on that functionality? I'm deciding if I need to take out my 4 flat and replace with 7 blade or if the adapter would accomplish everything. I just got an RV to tow and am having trouble figuring out why the brake and turn signals are not working. I am using an adapter. Going to test a few things tomorrow with the trailer plug, and the truck itself. Thanks

[chuckminer]

where's the install wire harness from scratch video? to the engine bay?

[ThomasACarlos]

Hopefully, someone can answer this question. I have a bad connection between the truck and trailer connectors. I want to know, do the pins on the truck side fit on the "inside" edge of the trailer blades or do they slide on the "outside" of the trailer blades and rest between the trailer blades and surrounding plastic encasement? Thanks.

[imjustsaying]

Where is the link for wiring vehicle from scratch mentioned in this video? I want to wire a 7 pin for a 98 Durango

[themastercarpenter]

your wire tester looks pretty awesome. Does it poke thru the insulation or work like and A/C testor which just senses the voltage?

[joywoodin]

Where can I find a set that has both 4 and 7 pin connectors?

[jpritch]

where did you get that light tester with probe guard?
?

[malichigriffin]

My Toyota pickup has a 7 way round plug and I'm not sure if it was ever hooked up for breaks there no break controller in it as far as I know and I don't know how to test if anything other than the pins for the ground blinkers, running, and break light work. I know they work because I have an adapter that goes from 7 to 4 pin. Any advise?

[jeffreydonahoo]

What's the link to the harness at 1:20 mark in video? The first one.