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Old 06-08-2018, 04:40 PM   #1
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4 prong to 7 prong adapter - please help

I have a 2017 Rpod with the 7 prong plug. I recently leased a 2017 Toyota Highlander and as part of the deal, they installed a tow package. They installed a 4 prong plug. Iím now trying to figure out what adapter to buy and whether it will charge the Rpod battery while on the road.

The Toyota dealership also told me that with this newer Highlander I didnít need a brake box installed in the car. Is that true?

Thanks for any help!
Kimmie
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Old 06-08-2018, 04:42 PM   #2
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I have a 2017 Rpod with the 7 prong plug. I recently leased a 2017 Toyota Highlander and as part of the deal, they installed a tow package. They installed a 4 prong plug. Iím now trying to figure out what adapter to buy and whether it will charge the Rpod battery while on the road.

The Toyota dealership also told me that with this newer Highlander I didnít need a brake box installed in the car. Is that true?

Thanks for any help!
Kimmie

This may be what you're looking for...

https://www.amazon.com/NEW-SUN-Conne...+adapter&psc=1
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Old 06-08-2018, 04:44 PM   #3
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You may need reverse of that...
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Old 06-08-2018, 04:46 PM   #4
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Thanks! It actually needs to go the other way. Iíve been on Amazon looking. With the one I found that goes the right way, someone asked if it charged the battery and the answer was ďno.Ē My RV dealer didnít have the adapter in stock and was of no further help.
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Old 06-08-2018, 04:49 PM   #5
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Be aware that the 4 prong will provide lights( brake lights, turn signals, running lights) only. You will not have brakes or aux power to the rpod. If the rpod has brakes you will need to rewire and have a 7 pin connector installed on the TV. If you have a 3way fridge and plan to run it on 12v while traveling, you will also need to run a 12V Aux line. Not sure you are going to find what you are looking for because of the above reasons. If the trailer has a 7 pin connector, it most likely has brakes.
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Old 06-08-2018, 04:50 PM   #6
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You may have to use something like this..

https://www.amazon.com/AnTo-Tailligh...railer+adapter
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Old 06-08-2018, 04:51 PM   #7
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The 4 prong to 7 prong will not charge battery and not provide voltage to the brakes on the Rpod if it has them. If the Rpod has brakes, then I would think that you need to have a brake controller installed in the Highlander by law.....depends on your state law.
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Old 06-08-2018, 04:51 PM   #8
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I believe with 4 prong only thing you will have is lights on trailer. Such as running lights brake and turn signals.
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Old 06-08-2018, 04:53 PM   #9
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Quote:
Originally Posted by Whimsical Gypsy View Post
I have a 2017 Rpod with the 7 prong plug. I recently leased a 2017 Toyota Highlander and as part of the deal, they installed a tow package. They installed a 4 prong plug. Iím now trying to figure out what adapter to buy and whether it will charge the Rpod battery while on the road.

The Toyota dealership also told me that with this newer Highlander I didnít need a brake box installed in the car. Is that true?

Thanks for any help!
Kimmie
I doubt it. Without a brake controller, you're driving with no brakes on the trailer. You're going to have to look into getting a brake controller, and wiring that to the proper 7-pin harness. The 4 pin harness doesn't have the connections for trailer brakes, so you can't just use an adapter.

That's why the 7 to 4 adapters are readily available, but you can't find 4 to 7. 4 Can't supply the necessary connections to support the 7, because it's missing the brakes.
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Old 06-08-2018, 04:58 PM   #10
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Check your lease. The minimal system they installed may be all they allow under a lease. Also find out what the tow package includes. Many times on lighter tow vehicles this is simply a class #2 or #3 hitch and 4 pin connector. You may also want an aux trans cooler depending on where you are towing and you will need a brake controller.
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