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7-Way Wiring Kit for 2019 Toyota RAV4 to Install Curt Echo Brake Controller

Question:

Am I correct in understanding that the required 7-way kit should be a ETBC7, and not a ETBC7L when used with a T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part 118801 to allow the tow vehicle to charge a trailers battery? If so, my questions are: 1 Can this 7-way kit be used with a Curt C51180 wireless controller as well as charge the trailers battery? Can you provide a wiring schematic for this, or is it as simple as the auxiliary yellow wire is connected through a CB to power the charge from the tow vehicle battery, and the blue wire is not terminated? 2 Is there a recommended disconnect switch/kit for the charge connection that will allow isolation if charging is not required or wanted? 3 Have the Curt C51180 been improved to allow it to be better secured to both the tow vehicle 7-way connection and the trailers 7-way plug? 4 To attach the ETBC7 to the Curt C13416 hitch that is 2 inch square tube, should I use a short bracket #18140 or a long bracket # 18136 or a Curt long bracket C57202? Are there any other items that you would recommend I purchase to finish my hitch and 7-way w/trailer charge install on a 2019 RAV4 hybrid? Thanks

1

Helpful Expert Reply:

These are good questions, and after adding the 4-way for your 2019 Toyota RAV4 Hybrid, the Vehicle Wiring Harness # 118801, you can use the 7-Way RV Upgrade Kit # ETBC7L or the Universal Installation Kit # ETBC7, but the latter (ETBC7) comes with more parts than you need, so I recommend the # ETBC7L. This kit is absolutely compatible with the 4-way T-One Harness, has the proper wire needed for running to the battery and is designed for use with mobile brake controllers like the Curt Echo # C51180.

In regards to a charge on the trailer battery, you can only run a maintenance charge from the 7-way to your trailer battery, you would need a battery charger like the CTEK Battery Charger # CTEK56353 to actually charge the trailer battery. To provide a maintenance charge you would need to run 10 gauge wire # 10-1-1 from the 12 volt pin on the back of the 7-way - which is at the 1 o'clock position if you are looking at the back of the 7-way - to the positive terminal of the battery. There is also not a way to add a switch for a charge connection/disconnection, and since the connector only provides a maintenance charge, I recommend just using the CTEK unless you will be gone for longer periods of time.

As for the bracket you asked about to mount the 7-way to Curt Trailer Hitch # C13416 on your '19 RAV4 Hybrid, I recommend using the Curt Easy Mount Bracket # C58000. While this is not one of the brackets you asked about, it is the best option because the tube of the hitch when mounted on your RAV4 is hidden under the vehicle. This bracket simply connects to the face of the hitch so there won't be any potential interference.

To complete your towing set up, the only other thing I recommend adding to your RAV4 Hybrid are towing mirrors, the K-Source Universal Dual Lens Towing Mirrors # KS3990 because this is going to extend how far behind you will be able to see when towing, and ensure you are as safe as possible when towing.

I have added links to a number of video reviews for you to check out as well.

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helpful expert reply by:
1
Kyle S

Question:

1) Will the Curt C51180 will pass through the 12 VDC from the TV 7-way hot lead (position 1 o’clock from the back side) to the trailer’s plug to afford a maintenance charge to its battery. b. Was I correct that the blue wire is not connected if using the Curt C51180? 2) You stated “To provide a maintenance charge you would need to run 10 gauge wire # 10-1-1 from the 12 volt pin on the back of the 7-way - which is at the 1 o'clock position if you are looking at the back of the 7-way - to the positive terminal of the battery. There is also not a way to add a switch for a charge connection/disconnection, and since the connector only provides a maintenance charge,…”. Your web page, shows a CB on this connection (black wire) for the installation of the ETBC7. Shouldn’t this 12 VDC hot lead be fused or CB protected for either the ETBC7 or ETBC7L? And if so, why couldn’t a disconnect switch be wired in line with the CB to break this connection to prevent TV battery drain if the trailer was left connected for an extended time frame while not in motion? 3) Did you address my question about the Curt C51180 being modified to reduce the chances of it being attached improperly, then while in motion becoming detached, and falling off the TV plug? I thought I read in a FAQ on the Curt website that they are looking into this. 4) I appreciate your suggestion of the C58000 bracket, but I would prefer to use another type if I can. I’ve discussed this bracket with people and been told that it bends very easily. After inspecting my hitch, I believe that a bracket can be mounted on the bottom (underside) of the hitch and still afford vertical clearance greater than the lower section of the hitch, thus keeping if relatively safe from impact. If you picture it like this, it may make it more understandable. Facing the rear of the car while looking at the hitch, I plan on installing the bracket with its short side up onto the bottom of the hitch. Then I will mount the plug’s bracket upside down, with the mounting bolts on the bottom, and finally, install the plug rotated 180° from the normal installation. What I would appreciate your assistance with this is for you to tell me the length of bracket that I would need to give the necessary clearance from the plug wiring harness at its back, to the hitch’s front vertical side. 5) Thank you for your mirror recommendation, I will review them when I can.

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Helpful Expert Reply:

Thanks for the additional clarification and to make it easier to navigate I'll go over them numerically:

1) Yes, the 12 volt will pass through the Curt Echo Brake Controller # C51180; it specifies in the instructions that the Echo "uses the 7-way connector's +12V connection to power the brakes, and it shares this power with the trailer." This is essential because people rely on that 12 volt pin for numerous applications, including what you are looking to do with an auxiliary battery and this was absolutely taken into account with the design of the Echo.

b) Yes, you are correct that the blue wire is not used with the Echo. That is the brake controller wire of the 7-way, and since the Echo uses the 12 volt connection, it is not needed.

2) I don't think I was clear enough in my earlier response so in regards to a circuit breaker, both the # ETBC7 and # ETBC7L do use a 40 or 30 amp circuit breaker when connecting to the positive post of the battery, but that is the only breaker required. Instead of a switch, what you can add is the Tow Ready Battery Isolation Solenoid # TR118665, which is actually easier than having to turn a switch on and off. This will protect your battery from draining and either side can be wired voltage in/voltage out, with the middle connection just needing to be wired to any ignition switch power source. That will make it so when you turn off your RAV4, the battery will be protected.

3) The Echo has not been modified in any way in regards to how it mounts, and I was unable to find a FAQ or post regarding this. I've put one of these into a 7-way, and I can tell you that it isn't going anywhere. You need to give it a good push to make sure it's in the 7-way, and it also has a tab on the top that secures it to the 7-way and is silicone-coated. This means it absorbs vibration so it isn't bouncing around and helps it remain stable.

4) I do believe I know exactly what you mean, and we've had customers mount the 7-way in the manner you are describing. The 6-1/2 inch length of the No-Drill Mount Bracket # 18136 will be plenty of length for you.

5) Happy to do so, we always recommend towing mirrors because they truly help increase your safety with their expanded view.

Hopefully, that answers all of your questions, so you can get everything set up and enjoy the outdoors! To simplify, here's a list of the parts for your 2019 Toyota RAV4 Hybrid:

- Curt Trailer Hitch Receiver # C13416
- 4-Way Vehicle Wiring Harness # 118801
- 7-Way RV Upgrade Kit # ETBC7L (my recommendation for use with the Curt Echo) or the Universal Installation Kit # ETBC7
- Curt Echo Trailer Brake Controller # C51180
- Tow Ready Battery Isolation Solenoid # TR118665
- No-Drill Mount Bracket # 18136

click to enlarge
helpful expert reply by:
1
Kyle S

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