Parts Needed to Add 7-Way Connection to 2011 Thor Majestic 23A on Ford E-350 Chassis

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Question:

I am trying to install a 7way trailer plug with trailer brakes. I found the plug for the controller in the dashboard and I believe I have found the spot under the rear of the motorhome. Im looking for the correct harness/adapter to buy. 2011 Thor Majestic 23a Ford E350 sd chassis

asked by: Steve

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Expert Reply:

Wiring for your 2011 Thor Majestic 23A on Ford E-350 Chassis will depend on whether or not you have the factory tow package/ports, which it sounds like you do. For a 7-way you would need the T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # 118261. See the attached picture which shows what the connections look like.

If you do not have the port for this and don't have the factory tow package then you would need to first install the # 118551 for a 4-way. Once installed, you would need the Universal installation kit # ETBC7. This kit comes with the adapter, wiring, and everything else you would need to upgrade to a 7-way.

The wiring harness for a brake controller would depend on the brand. If you still need a brake controller I recommend the Redarc Tow-Pro Liberty Brake Controller - Proportional # RED24FR. The main unit for this brake controller installs behind the dash, with only the control knob showing in the cab of your motorhome.

You would then need the Redarc Plug-and-Play Wiring Harness for Tow-Pro Trailer Brake Controllers # 331-TPH-005 for installation using the factory port. If you do not have the factory port then you would need the # RED69FR instead. I would make sure the wiring harnesses for the 7-way and brake controller match up with the plugs you found on your motorhome just to be sure.

I have attached some review and installation videos for your reference.

expert reply by: Robin H

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Tekonsha 7-Way Connection for E-350.
(click to enlarge)

Answer 1

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 2

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 3

If you have a vehicle specific wiring harness for a brake controller then that would indicate that you have a factory tow package and subsequently would already have a 7-way at the back of your vehicle. The universal 7-way connector #ETBC7 is meant…

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Answer 4

The first thing you will need for your 1999 D250 is a 4-way. The Curt T-Connector Vehicle Wiring Harness #C55317 plugs into the connection points behind your rear bumper and will allow you to power your trailer's signal lights. Once the 4-way is…

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Answer 5

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 6

It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side…

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Answer 7

For your 2024 Hyunda Santa Cruz we have the Curt 7-way kit part #C68JR that is a confirmed fit. This installs by plugging into a factory wiring connector on your vehicle which means a really easy install that doesn't require any splicing.

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Answer 8

Sure thing, I will go ahead and list out what you need for your 2023 Kia Sportage to add a 7-way for a brake controller so you can tow with the Curt Trailer Hitch Receiver #C94WR: - T-Connector Vehicle Wiring Harness with 4-Way Flat Trailer Connector…

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Answer 9

Hey Antoine, so the two kits you mentioned are actually really similar and honestly I would go with the part #ETBC7 if I were you. The #ETBC7L is basically the same thing minus a couple wires and breakers so you may as well get the kit that has…

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Answer 10

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 11

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 12

The trailer brakes work on a separate circuit than the lights. You have a couple of options to control the electric brakes on the trailer. One option is to use an air over electric brake control, #HA100400C. This unit connects to the air brakes on…

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Parts Needed to Add 7-Way Connection to 2011 Thor Majestic 23A on Ford E-350 Chassis

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