How To Convert a Trailer From a 4-Way to a 7-Way Trailer Connector

Question

Question:

We are converting our trailers to a 7 round pigtail. do you have the 7 round plug and wiring harness for the trailer?

asked by: Jay

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Expert Reply:

In order to convert a trailer from a four way flat to a seven way round I recommend using the Trailer Wiring 7-Way Upgrade Kit part # 277-000141. It comes partially pre-assembled along with the rest of the components you need to make the switch. The only thing you need to do is cut off the old trailer connector and then attach these wire leads to the junction box.

expert reply by: Conner L

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Answer 1

To run a charge line to your battery you will first need to install a 7-Way on your trailer. This can be done using the Epicord 7-Way Molded Trailer Plug with Junction Box #277-000141. The Black wire in the junction box is the one that will carry the…

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Answer 2

Typically a 4 Flat plug will not have a lead that goes to a battery as the White wire is the Ground, The Yellow is Left Turn/Brake, Green in Right Turn/Brake, and Brown is Running Lights. If you were using this for a different application, you can…

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Answer 3

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 5

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 8

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 9

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 10

Hey Richard, thanks for reaching out! The Dexter DX7.5 Drop-N-Go Brake Actuator #099-175-00 is a great option for a replacement actuator because it's a direct replacement for the common Model 60 actuators that were popular in the '90s.…

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Answer 11

Whether or not you can flat tow with a Jeep bumper is really up to the manufacturers testing; some of the big names like MetalCloak or Poison Spyder have bumpers with D-ring attachments that can be used for flat towing connections. This is great…

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Answer 12

You are correct that this refrigerator does not have an ON/OFF switch or function. The best you can do is "Standby" that draws an unknown amount of power. One option is to pull the 12-Volt fuse at the RV power center. A much better option…

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How To Convert a Trailer From a 4-Way to a 7-Way Trailer Connector

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