Baja Designs Upfitter Light-to-OEM Switch Wiring Harness for 4th-Gen Tacoma (2024–Present)

The Baja Designs Upfitter Harness is engineered to simplify the installation of auxiliary lighting on the 4th-Gen Tacoma by enabling direct communication between aftermarket lighting systems and factory-installed auxiliary switches. This approach reduces installation complexity while preserving a factory-quality appearance within the vehicle’s electrical architecture.

Built using automotive-grade insulated wiring and sealed connectors, the harness resists vibration, temperature fluctuations, and moisture exposure. Reinforced terminal contacts maintain strong electrical conductivity during extended off-road use.

The harness features a streamlined routing architecture to reduce visible wiring and simplify installation paths. Pre-terminated connectors and organized wiring channels allow efficient setup while maintaining a clean engine bay and interior appearance.

Designed to control up to three compatible lighting kits simultaneously, the harness maintains stable electrical signal transmission between the vehicle switches and auxiliary lighting systems. The system supports reliable on-demand lighting activation without electrical interference.

Engineered for long-term outdoor performance, the harness uses protective sheathing and corrosion-resistant terminals to resist dust, moisture, heat, and mechanical wear during sustained off-road and work applications.