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TOLERANCE STACK Article

Understanding Your 3rd Gen Tacoma Seat Wiring Before Upgrading to scheel-mann Seats

Preparing for Your scheel-mann Upgrade

When removing the factory seat in preparation for your scheel-mann installation:


  • Note the routing of wiring harnesses around seat mounting points

  • Disconnect the vehicle's battery before beginning work

  • Wait at least 90 seconds before handling any yellow airbag SRS connectors

  • Store the disconnected factory seat with airbag components facing upward

Understanding Your 3rd Gen Tacoma Seat Wiring Before Upgrading to scheel-mann Seats
Understanding Your 3rd Gen Tacoma Seat Wiring Before Upgrading to scheel-mann Seats

Before undertaking the popular scheel-mann Vario seat upgrade for your 3rd Gen Toyota Tacoma, it's essential to understand the factory electrical setup underneath your stock seat. This knowledge will make the transition smoother as you'll need to reuse some of these harnesses when installing your aftermarket seats.


Factory Seat Wiring: What's Under Your Tacoma's Driver Seat

The 3rd Gen Tacoma equipped with powered and heated seat features a comprehensive wiring system with several distinct connectors. Each serves a specific purpose in the seat's functionality and safety systems:


Key Connector Components

  1. Heated & Powered Seat Connector

    This large, square, multi-pin connector carries power and ground for the seat motor functions plus power, ground, and control for the seat heater.

  2. Mid-Harness Connector

    This mid-harness connector connects the floor harness to the seat heater computer, and with our newest harness design, no longer gets reused. The only harness being reused is the seatbelt, it's harness, and the seat heater computer.

  3. Seatbelt & Proximity Sensor

    This safety connector interfaces with the vehicle's seatbelt warning system and occupant detection. It signals the vehicle when the seat is occupied and whether the seatbelt is fastened. This connection must be retained and properly integrated with your new seats to avoid warning lights and maintain safety functionality.

  4. SRS/Airbag Connector 

    The distinctive yellow connector is part of the Supplemental Restraint System (SRS). It controls the side airbags built into the factory seat. When upgrading to scheel-mann seats, you'll need a proper solution for this connection to prevent airbag warning lights. This installation requires our INCLUDED Airbag Proxy since aftermarket seats don't include side airbags. No need to purchase additional but for more info:



  1. Seat Heater Computer

    This small black control module regulates the temperature of the heating elements. It processes input from the dashboard controls and manages power to the heating elements. Upgrading to scheel-mann model, you will need to repurpose this component to get the OEM seat heater dash buttons to operate correctly.


By understanding the factory connector setup, shown in the main image, before beginning your upgrade, you'll be better prepared to integrate your new scheel-mann Vario F seats while maintaining as much original functionality as possible. This pre-upgrade knowledge helps ensure your premium seat upgrade enhances your Tacoma's comfort without compromising its safety systems or creating electrical headaches.

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