OEM Inverter Install

Hey all, I am reposting this thread that I originally posted in Technical Chat. After two weeks I had zero replies so I'm reaching out to a larger audience.

I got my hands on the OEM inverter, the switch in the dash, the wiring from the inverter to the rear of the truck and into the engine bay as well as the AC socket part for the box.

The switch plugged neatly into the dash and the wiring was behind it allowing it to be plug and play.



I installed the inverter under the center console and again it was plug and play to the white plug end that was already there. I then attached the wiring harness that goes from the inverter, under the passenger seat and out underneath the truck. One end I wired to the box and the AC socket.



The other wired into the engine bay and terminated like in the below photo.



This is one of the two things that I need help with. I need to connect from that single pin grey plug through a fuse and relay into the battery connection but I don't seem to be pre-wired for that. Does anyone know the name of that connector and where I can get the mate for it.

The other issue is that although the wiring for the dash switch was present and plugged right into the switch and even lights up the switch when pressed, I don't know where the actual control wires terminate. Since I don't have the relay and none of the control wires from the switch terminate at the relay receptacle I was wondering if anyone knew where they did terminate. They are in the red box.



I realize this is a little long and complicated and I probably didn't explain as well as I could have. Please let me know if there are any questions I can answer that would help explain better.

Thanks.

 

so youre looking for the way to connect the bed plug to the oem switch you have in the cab?

the wiring usually runs somewhere behind the dash and down the left side to the engine bay. itll suck but id start where the witch wire ends and follow that to the hopeful plug. if not you may need to do some research and some more DIY wiring

 

I agree that trying to trace the wiring from behind the switch through the firewall, if it goes that far will definitely suck. I was hoping someone here might already know where it terminates. Because somewhere the wires from that switch should go to the relay to activate the inverter, but they don't come into my relay box under the hood. A bit more DIY wiring from the plug under the hood to the battery won't be too hard, although it would be nice to find the proper mate to the plug.

 

While your in there I would do the anytime mod

https://www.tacomaworld.com/threads/how-to-ac-outlet-in-cab-400-watt-anytime-mod.322320/

That diagram says 1of 3, do you have the other 2 diagrams?

 

On the harness, where it plugs to the switch are all 5 the wires there?

 

I wish I could help you out with the factory setup, I'm a big fan of inverters, but all I can say is get a 600W PSW aftermarket inverter and scrap the factory inverter.

You have skills, slap an aftermarket inverter like this https://www.donrowe.com/Samlex-SSW-600-12A-p/ssw-600-12a.htm into the truck. Mount it under the driver seat since there is a grommet you can pierce to get the Positive cable in. Then you ground it to the seat bolt. Easy.

Run braided 4AWG directly from the battery + terminal through a circuit breaker like this

KUMEED 12V DC 20A 30A 40A 50A 60A 80A Car Audio Inline Circuit Breaker Fuse for System Protection (80A)

https://www.amazon.com/dp/B01LA7PSQ...&pd_rd_r=c9e9471b-b61f-11e8-b560-8d045d38d0f1
Or an ANL Fuse.

Run AC extension cord(s) from the inverter to the bed or wherever. Pretty easy, done it five times on Tacos, Tundra, 4Runners. I use the Samlex because it is thin enough to fit under the driver seat.

You can add in a low voltage cutoff device also to save your truck battery.

 

(I didn't wanna say that)

I'm big in inverter too! OEM is modified sine, it will burn up electric motors, like high draw power tools. Big pure sine inverters are alot better... (ALOT more $$$ though) depends on what you want to use it for.

 

Yep, I always use PSW because they can power anything, no limitations. MSW can cause radio interference also.

 

Xantrex are really good too

 

If your stationary to power something, best thing I found is Get a long set of really heavy duty jumper cables, cut the clamps off of one end, hook the cut end to the inverter, put it in a dry spot, clamp the clamps of the jumper cable direct to the battery

 

Thanks for the suggestions. It probably would be easier to install that Samlex under the driver's seat. I could even wire it to the AC socket in the rear with a little work. It would be really nice to wire it through the OEM switch into the engine bay for the OEM fuse and relay location and then out to the AC socket in the rear. I might have to think about this plan instead. Though at that point I could likely create a new wiring harness to finish the OEM install.

The harness that plugs into the switch did have all five wires. I know that the ones that attach to the LEDs work because both of them light up when I press and hold the button. I have the other two diagrams as well. One of them doesn't really apply. The other one with the red squiggly line shows the path that I need to create to power the inverter. I added both for your viewing pleasure.

 

I think I see what's going on.

'A' pin 5 on the relay connects to the battery. (your squiggly line)

When you hit the switch, pin4 and pin 3 on the switch connect. pin 7 BLU on the inverter and D10 up top are energized, closing the relay. The relay then connects pin 2 on the inverter BLU and your Squiggly line from the battery powering the inverter.

I got a bunch of different relays in the shop, if you can't get an OEM one, lemme see what I can come up with.

 

Well, that took all of about 5 minutes...

You want the good news or bad news first?

 

Good news... (if you call it that) the relays 'can be bought'

I run REAL HID headlight. Meaning H4-4. Both hi and lo beam are separate HID filaments, meaning I use 4 HID ballasts, 2 per headlight. They are EXTREMELY rare and $$$$!

So I keep not one but two spare sets on hand at all times!!!!

Here is the related part that you care about, lol!

They use the same relay. Now, the reason I started keeping 2 backup sets of H4-4 and relays on the shelf in the shop is because I got stranded once when the main power wire to the relays shorted and fried BOTH relays.

I spent all that night going to every parts store I could find still open with no headlights!

Autozone sells a light kit (you have to buy the whole damn kit to get each relay) for about $50.

So, to get home... $100 spent... Tossed so BS 'baja' 6" lights in the trash on the way out!

Anyways...

 

Oh, the bottom relay, is a relay for normal off road light. For comparison.

 

Thanks for the offer. I'll keep you in mind if I can't find the right relays. I haven't had a chance to trace the wires yet, but once I get it done, I'll post the results back here.

 

Thanks for the parts numbers and the diagram. I already spoke with Toyota and they were able to get me that connector for about $18. Then I would still need a relay and wire and see if I can wire it in. Just got to find time to do all this.

 

Any update @Neveraeon ?