6th Gen 4Runner Electrical Mods Help

[TRD JON]

Drafting up this post as a guide/resource for those who need help with electrical mods, wire routing, hybrid battery setups, etc.

The new 4Runner will have pre wired AUX switches as well, so this thread will pose as a helpful resource for those to reference for their wiring needs.

Drop your questions, wiring diagrams, etc down below for everyone.

 

[ke8wvb]

Does anyone know if adding the electric brake controller is easily doable for a 2026 4runner?

OR

I'm trying to add auxiliary switches to my 2026 Toyota 4Runner TRD Off-Road Premium, but I can't find any details on the pre-wired connector locations (e.g., for pigtails like PT974-89251) in the owner's manual. Does anyone know if this info was omitted for a reason, such as these features not being included in the 2026 model? Any insights or references would be appreciated!

 

[Archer80]

Not sure about the 26' but here's a thread on the 25'.

Prewired Auxiliary Connector location(s)

Does anyone have a diagram of where the pre-wired auxiliary switch connectors are in the engine bay? I know there’s one below the windshield washer reservoir that I’ve seen people post about but I’m not sure where the other ones are located and haven’t really seen any good information on that...

www.4runner6g.com

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