The Trig TT21 & TT22 Wiring Harness Plus TN72 Connection, part number 01992-00, is a long-length cable harness designed for installations where greater separation between avionics components is required. Measuring 118 inches in length, it connects a remote-mounted TT21 or TT22 compact transponder to a panel-mounted TC20 control head while also providing the necessary wiring interface for a TN72 GPS receiver.
This harness includes all required conductors to support power, control, and data connections between the TT21/TT22 transponder and the TC20 control head, along with GPS position input from the TN72 for ADS-B Out compliant installations. The extended length makes it suitable for aircraft with larger avionics bays or distributed equipment layouts, allowing clean and compliant cable routing.
Manufactured by Trig Avionics using aviation-grade materials, the 01992-00 wiring harness is intended for installation in certified aircraft in accordance with applicable aircraft approval data and Trig installation instructions. It provides a manufacturer-approved solution for integrating TT21 or TT22 compact transponders with associated Trig control and GPS components in more complex installations.
Key Features
- Long wiring harness for Trig TT21 and TT22 compact transponders
- 118-inch length for distributed avionics installations
- Connects TT21/TT22 transponder to TC20 control head
- Includes wiring for TN72 GPS receiver integration
- Manufactured using aviation-grade materials
- Trig Avionics approved installation accessory




















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