Best Way to Add 7-Way Connector on 2009 Toyota FJ Cruiser for 12V Power to Trailer

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Question:

What the best way to add a 7pin connection to my 2009 Toyota FJ. Currently there is no trailer connection. Im only needing the 7pin in order to charge batteries on my tear trailer, no electrical brakes. I was thinking of installing the 4 pin flat wiring package to the back tail lights and running a charge wire from the battery and converting the wires over to a 7-pin. Not sure if this is a good idea. Thanks.

asked by: Scott W

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Expert Reply:

The best solution for your application is to install the Tekonsha T-One # 118405 on your 2009 Toyota FJ Cruiser for your standard trailer lights and then add the Wiring Kit # ETBC7L which comes with everything you need to convert the 4-Way to a 4-Way/7-Way and add the 12V function.

Please note that as power runs along that line there will be some voltage drop which will likely keep your batteries from charging completely. To help remedy this I recommend using the Redarc In-Vehicle BCDC Battery Charger 25 Amp # 331-BCDC1225D or 40 Amp # 331-BCDC1240D because they have smart technology that reads what kind of batteries are charging and boosts the power output to match them. The BCDC also has an integrated solenoid to keep your batteries from pulling power when your FJ Cruiser is turned off. You can also add solar panels to them in the future which makes for a perfect combination to go dry camping or boondocking.

I have attached some videos that you can check out.

expert reply by: Jon G

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Answer 1

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 2

Because most trailers don't have reverse lights, we don't have any video footage the adapter from the #ETBC7 being wired into the reverse light circuit of a Toyota FJ Cruiser. However, I can run you through the process. You'd want to…

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Answer 3

The #30717 is exactly what you're looking for as long as you don't need the 7-way to supply anything other than lights on the trailer. You just plug the 4-ways together, connect the white ground wire to the vehicle's frame using the…

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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

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 6

Actually, the P3 now has the upgraded axis accelerometer like the P2. The Tekonsha P3 Trailer Brake Controller #90195, will work with both electric over hydraulic brakes on the trailer as well as electric brakes. It has a menu option on the display…

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Answer 7

The best brake controller option to go with is one that activates the brakes proportionally instead of time delayed. A proportional brake controller will activate the trailer brakes at the same time and with the same intensity as the tow vehicle…

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Answer 8

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 9

I would be happy to help you set up your 2022 Toyota Highlander to haul your new travel trailer. The wiring harness you currently have controls your trailer's lighting functions only. You do not need to rewire your Toyota you just need another…

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Answer 10

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 11

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 12

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

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Best Way to Add 7-Way Connector on 2009 Toyota FJ Cruiser for 12V Power to Trailer

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