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Old 03-20-2017, 12:42 PM   #1
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7 Way Molded Plug Trailer Cord Harness

Hello!

Question...
Someone was nice enough to attempt to cut my 7 Way Trailer Cord that plugs into my truck with what looks like a pair of dikes.

I tried a few RV places (CW) ect to get an estimate, but I got the old "Umm, Errr, Uhh Ya we would have to see it to know how much it will cost.
You would think I could get a ball park idea...
Has anyone on here ever had one replaced??
Just trying to get a ball park price on replacement and install.

As always...Thank you!


Rhody
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Old 03-20-2017, 02:22 PM   #2
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Rhody, Do it yourself and save $$.

1. Measure the length of the cord. I think they come in various lengths.

2. Go to any rv place or on line and buy a new one.

3. The end of the 12v cord goes into a metal box underneath your trailer
(front street side corner).

4. Take the cover off the box, take a picture of how the wires connect
(color to color) usually connected with wire nuts.

5. Disconnect necessary wires, pull old cord out of box and put new cord
into the box.

6. Reattach wires from new cord to the proper wires in the box. Might
have to strip the ends of the new wires before reattaching.

7. Attach wire nuts tightly and tape the nuts and wires together. I always
tape the wirenuts to the wires to prevent them from coming loose while
traveling.

8. Replace cover on box and plug the cord into your tow vehicle to test.
You might have to use nylon bands to attach the cord to the trailer
frame to keep the cord in place.

Hope this helps.

Bob
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Old 03-20-2017, 02:29 PM   #3
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Thank you Bob!
I am not much of an electrician, but I may take a stab at it when it warms up!

Thanks again!
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Old 03-20-2017, 02:35 PM   #4
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Yes, very easy to replace. Either the whole new cord (probably best) or a new end piece after cutting off the bad part (assuming it has enough etra wire). Just take a picture of the wire colors as they are wired in the J box then match up the new one. Easy peezy.
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Old 03-20-2017, 03:08 PM   #5
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As said it is easier to cut the end off and replace it with a molded plug right to the box It is easier then just buying a new end. A 5' plug should cost around 40 or 50 bucks depending on what you buy, Make sure the plug in is the same, they have 2 different ones. More the likely you need the spaded end not the pointed one.
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Old 03-20-2017, 03:48 PM   #6
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This is what I buy when I replace the pigtails on trailers. These plugs are sealed and have double contacts for the best connection. This one is 8 ft long and can be cut to length. Also here's the diagram to help you along. Don't count on the colors matching so test the old plug with a test light while plugged into the truck. Write down what color does what and keep it with your trailer paperwork for the future.
https://www.amazon.com/dp/B01FWIFSCE..._s7d0ybSMVRAHY

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Old 03-20-2017, 04:09 PM   #7
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Try to get the waterproof gel filled wire nuts. They cost a little more but are worth it.
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Old 03-20-2017, 04:15 PM   #8
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A quick look into the metal box where your cable is spliced into the RV's wiring will let you know if you are able to handle the job yourself. Towing your RV without brakes and lights should be avoided.

The only thing I can add to the advice you've already received is to disconnect all wires hooked to your RV battery's negative terminal before taking things apart, as the wire on terminal 4 would likely have battery voltage.
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Old 03-20-2017, 04:20 PM   #9
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You could also use rubber mastic electrical tape to make it waterproof but it will make it harder to make repairs later.

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Old 03-20-2017, 04:44 PM   #10
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Cable cut

Quote:
Originally Posted by Rhody View Post
Hello!

Question...
Someone was nice enough to attempt to cut my 7 Way Trailer Cord that plugs into my truck with what looks like a pair of dikes.

I tried a few RV places (CW) ect to get an estimate, but I got the old "Umm, Errr, Uhh Ya we would have to see it to know how much it will cost.
You would think I could get a ball park idea...
Has anyone on here ever had one replaced??
Just trying to get a ball park price on replacement and install.

As always...Thank you!


Rhody
I have had two partially cut cables. Not vandalism---I turned to sharp. Replacements re found at Tractor Supply or most other farm, trailer, Harbor Freight type places. Open your junctiion box and take good pictures. One wire at a time.
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