The Trig TT21 & TT22 Wiring Harness Plus TN72 Connection, part number 01991-00, is a short-length cable harness designed for compact transponder installations using Trig equipment. Measuring 39 inches in length, it connects a remote-mounted TT21 or TT22 transponder unit 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 control, power, and data connections between the TT21/TT22 compact transponder and the TC20 control head, as well as GPS position input from the TN72 for ADS-B Out compliant installations. Its short length makes it suitable for installations where components are mounted in close proximity, helping reduce excess wiring and improve installation cleanliness.
Manufactured by Trig Avionics using aviation-grade materials, the 01991-00 wiring harness is intended for installation in certified aircraft in accordance with applicable aircraft approval data and Trig installation instructions. It provides a reliable and manufacturer-approved solution for integrating TT21 or TT22 transponders with associated Trig control and GPS components.
Key Features
- Short wiring harness for Trig TT21 and TT22 compact transponders
- 39-inch length for close-coupled 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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