How to Use Factory AUX Harness in 2024 Tacoma SR5 4x4 (No Pigtails or AUX Buttons, No Firewall Wiring Needed)?

[patriotgiants]

Hey everyone,

I have a 2024 Tacoma SR5 4x4 that came with the factory auxiliary harness (Locations A & B), but it did not include pigtails or factory-installed AUX buttons. Since the harness is already installed, I want to figure out how to use it without running additional wiring through the firewall.


What I Know So Far:

Location A (Engine Bay) has power and is designed for connecting accessories.

Location B (Cabin - Behind Trim Panel) is also powered, capped from the factory, and can be used for switches.

I do not have factory AUX buttons, so I need to figure out how to control these circuits using the existing harness.


What I Need Help With:


1. How do I properly connect accessories (like ditch lights) using only the existing harness?


2. How do I control the circuits without factory AUX buttons?


3. For anyone with the factory AUX buttons installed:

Can you share a picture of your switch panel so I can see what it looks like? does it directly connect to Location B, or is there another module in between?

Goal:

I want to use the factory harness as Toyota intended, without running new wires through the firewall. Any help, wiring diagrams, or photos would be greatly appreciated!


Thanks in advance!

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[Brian2011]

I would assume there is a connector right where the aux switch panel would go as it came from the factory or somewhere in that area of the panel that needs to pop out. you might be able to order the panel and the switches from Toyota along with the pigtails, I would not look to splice anything on the truck at all.

cali raised has OEM factory switches that will fit into your blanks, see this thread here for more insight on the relays and fuse panels. Trucks without factory aux switches | 2024 Tacoma Forum (4th Gen) News, Specs, Models - 2.4L, Hybrid, TRD Pro, Trailhunter, Off-Road, Sport, SR5 -- Tacoma4G.com