12v / USB Power - how to make always hot?

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What an awesome tip; thank you! Exactly the kind of solution I was looking for.

Thank you for this tip. It worked out perfectly without any added wiring.
One piece of advise is it seems its polarity specific so be sure to plug the add a circuit in the exact orientation as the picture, also put the fuse in the same socket closest to the wire. I did it the wrong way and it kept my radio on instead of the 12v sockets. Hope this helps anyone that runs into this issue

Thanks for this. I had the radio-turning-on issue and following this helped me.
 
Thanks!

Did this today. Worked great. Followed all the instructions and warnings. Super easy. 12v outlets are hot. Radio stayed off. MUCH cleaner than running new wires (needed the rear outlets to be hot). And the little fuse box under the dash (above the parking brake pedal) is out of the way so leaving the cover off is no issue at all.

Very very helpful. Thanks all.
 
I decided to run a separate switched power to a duel cigarette socket. I missed doing old school wiring


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I asked the same question some months ago, but have yet to get a reply.

I used to have a 2002 Tacoma TRD and there was a trick I found online that involved simply a short jumper wire between two fuses in the box under the hood to make the outlets live. In the 17 years I owned the truck never had an issue. I wondered if something like that could be done on the 4Runner.
 
I'm looking to do this in my 2019 as well. But is this the best and safest way?

Besides doing a separate hard wire is there any other way of doing this?

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Safest way is direct to battery with the proper fuse

I asked the same question some months ago, but have yet to get a reply.


I used to have a 2002 Tacoma TRD and there was a trick I found online that involved simply a short jumper wire between two fuses in the box under the hood to make the outlets live. In the 17 years I owned the truck never had an issue. I wondered if something like that could be done on the 4Runner.

I tried the same mod on my 2019 tundra.. the radio would not turn off.. i ended up jumping the relay in the fusebox under the hood..
 
I assume the 2018 4Runner is considerably more complicated than my old Tacoma, so figured live ports must be reversed engineered from what Toyota did to put them on the accessory loop. It was such a simple job on my Tacoma. For 17 years I always had live ports, constantly running a CB radio and a 200 channel scanner. Sometimes the truck would sit for two or more days with them running and I never experienced a dead battery until they were ready to die (I had recently installed the third battery in the truck when I gave it to a family member when I bought my 4Runner last year).
 
I did this on a 2017 and the radio is also turning on. It was great for the drive in but in general I need to figure out how to just get the rear accessory 12v to be constant. Anyone figure out why this is happening?
 
I thought about this long and hard and why not just connect a battery bank inline with your existing switched outlets?

Will store power but not let your car die if left too long. I’m sure there are ways to conceal it or make the dash outlets be the output of the battery.


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I thought about this long and hard and why not just connect a battery bank inline with your existing switched outlets?

Will store power but not let your car die if left too long. I’m sure there are ways to conceal it or make the dash outlets be the output of the battery.


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I'm having trouble understanding your question, are you asking why not just turn your starting battery into a battery bank for additional capacity?
 
I'm trying to do this on my 2012, but I think my fuse box layout is different than the 14+. Does anyone know what fuses I should jump between? Thanks!

Did this with my 2010 LE and works great. Make sure you're installing the fuses correctly in the add-a-circuit. I had to move them one or two times before it started working. An easy indicator could be to plug a phone charger in and listen for your phone to chime that it's charging, or something with a light that you can see from the floor.
 
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In case it hasn’t been posted on here, I think I figured out how to do this on a 2021 (and presumably 2020). Do the add a circuit trick - between IGN NO 3 and P/OUTLET under the dash. Then under the hood, remove the relay labeled ACC NO 3, make up a small jumper and jump the two contacts where the copper terminals on the relay would plug in. I don’t believe this powers the rear seat usb outlets - I’m guessing those are fed from P/OUTLET NO 2 under the hood.
It doesn’t appear anything other than the outlets come on, but I’ll confirm that over the next few days.
 
So, it appears jumping the ACC NO 3 relay under the hood completes the circuit for just the front power outlets on the 2021 Runner to remain always on.

Glad this worked as I had already extended wiring from the aux battery fuse block to the interior fuse block for this.
 
I did this on a 2017 and the radio is also turning on. It was great for the drive in but in general I need to figure out how to just get the rear accessory 12v to be constant. Anyone figure out why this is happening?

Apparently I’m quick to work and slow to read. I’ll try again tomorrow with the direction of the add a circuit in mind.
 

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