Wiring accessories to new 4th gen Tacoma hybrid

[bryncj]

I am wondering how people have been wiring their accessories on the new Tacoma hybrid since the 12V battery has been moved from under the hood to under the seat.

 

[VprGts]

I’m about to find out when I install my rough country power side steps. I imagine it’s no different except now you have to run the power ground cables to the rear seat battery location.

 

[desertpunk]

I am wondering how people have been wiring their accessories on the new Tacoma hybrid since the 12V battery has been moved from under the hood to under the seat.

I have the TRD Sport Hybrid, this is what I learned so Far- the premium models have 3 Aux switches on the Left driver side panel(Aux1 Aux2 Aux 3) these go to relays on your driver side Fuse box, there are 3 pigtails that you get with the purchase of your truck in the glove box. These pig tails go to 1 location under your windshield washer fill tube, 1 location behind the driver side kick panel and the last one is under your tailbed attached to the frame these locations are capped plugs.
My truck has all of that except the Aux switches or the appropriate relays and the plug connections are not behind the switch panel but the cables(yellow, pink, white,black) are curled back into the wire sleave un-terminated.
So each pigtail has 3 wires on it, a white, gray and black!? Each one of those is hot for 1 of the 3 Aux switches, Aux 1 is a 15 amp fuse, Aux 2 is a 10 amp and aux 3 is a 5amp the relays are all 20 amp Denso blue relays. The purpose of these are for the compressor, light bars etc that toyota has on the trailhunter and pro but some premium models have these availible for whatever you want to add like ditch lights power switch for Winch etc. Cali Raised makes oem fit switches too. Me being called Pour outlook. Have to figure out something on that. 1 youtube video I saw had a bunch of power connections to the top left bolt on the Passanger side Fuse box but that also runs to the Inverter directly so I'm not sure if that is straight to the Battery or what-not. And when I asked the Dealer they were completely useless and not forth coming instead they told me this- " "well I guess if you wanted that stuff you should have bought the Trailhunter instead"( which they didn't have at the time). If anyone figures this stuff out let me know, this is as far as I got so far.

 

[tacomel]

I am not sure how possible this is, but I would use the post in the fuse box that's used for jumpstarting the 12v battery. Try to hook up a power management system (aux beam, Garmin etc) to that post and then hook all other accessories to that system.

Here is the pic from the owners manual:

 

[desertpunk]

So in that box the uper left bolt in there is a 12v constant hot, my issue is where does it get 12v direct from battery or through a circuit. If it's straight 12v Batt then that's where I will get power as many others have. I reached out to corporate Toyota to see what they say
Notice his diy cables present.
but I don't want to do some DIY stuff if I can do a OEM.
If I can't well then I'm going to build a tray and fuse/relay box with a 100a cut off switch and terminal blocks. This is too high tech of a truck to Jerry rig and they did provide a harness just for this but then snub their corporate nose at us with all the Pesant blanks on our Dash.

 

[tacomaco]

So in that box the uper left bolt in there is a 12v constant hot, my issue is where does it get 12v direct from battery or through a circuit. If it's straight 12v Batt then that's where I will get power as many others have. I reached out to corporate Toyota to see what they say
Notice his diy cables present.
but I don't want to do some DIY stuff if I can do a OEM.
If I can't well then I'm going to build a tray and fuse/relay box with a 100a cut off switch and terminal blocks. This is too high tech of a truck to Jerry rig and they did provide a harness just for this but then snub their corporate nose at us with all the Pesant blanks on our Dash.
View attachment 1186

Did you ever hear back from Toyota? What did you end up doing? If you have any pics most appreciated. I am adding some ditch, grille lights to my Taco would love to see how you did it.

 

[tacomaco]

I did some more digging under the hood today, and that 12v in post #5 goes to the ECU that controls the electric motor connected to the transmission. My plan is to use that post, mount an Auxbeam relay center on top of the fuse box, then use one of 2 fuses (20a wiper most likely) for the ACC. That was the only active fuse that was on ACC. I will have the 60a cut off switch that comes with the Auxbeam mounted on the side of the engine compartment just to the upper left of the fuse box. That leaves just enough cable to run across the engine bay and into the cabin via the rubber grommet on the driver side. Also getting the Tacoma Lifestyle Auxbeam panel mount that replaces the factory plastic. Happy to hear what others figured out!

 

[Pecekeepr]

So this is what I did to my TRD sport hybrid. I installed the 8 gang auxbeam tying into the 12volt post in the fuse box. If you look at the instructions for the Spod they tell you to mount it there and show how to disassemble the cable protector around the 12 volt feed. There’s also a YouTube video with a guy doing an auxbeam to a Tundra Hybrid. So I basically merged the two and that’s what I came up with. Here’s the YouTube link

One of the photos is a screenshot from Spod’s installation and the rest are from my install. Also there’s a screen shot in there of the guys install from the Hybrid Tundra that I was using as a guide for my build. It’s a still taken from the YouTube video