Wiring diagrams?

Where can I find wiring diagrams for the 3rd gen?

Specifically, I'm looking for diagrams for the inverter circuit.

 

https://techinfo.toyota.com/

 

Thank you so much!

Unfortunately, I'm not sure it's gonna help...

Here's what I'm trying to do:

The 2017 TRDOR high output alternator is a "smart" alternator: The ECM controls its output based on (supposed) system needs.
See: 2019 Tacoma Alternator - Is It “Smart” | Page 2 | Tacoma World

I have a DC-DC charge controller in my camper fed by pin 7 on the towing plug.

The voltage on that pin drops way low (~5V) while driving because the stupid (smart) alternator doesn't believe there's a load.

I've struggled to find any way to work around this.

I had the wild idea that perhaps I could fool things by tricking the alternator/ECU to think the inverter was pulling juice. But the wiring diagram didn't help me with that.

Any suggestions?

 

3rd gen Service Manual is still floating around on here or you can access it below:

https://cardiagn.com/toyota-tacoma-2015-2018-service-repair-manual/

Maybe something in there will help.

 

Here is another link that may help.

https://www.ttguide.net/other_system-2117.html

 

It should be pin 3

 

Right. Mispsoke.

 

You might have a wire problem, since the only control to the towing battery charging relay is a IGN source trigger.