This TT21 & TT22 wiring harness with TN72 connections is a 39-inch short cable harness that connects a TT21 or TT22 remote mounted transponder unit to a panel mounted TC20 control head as well as a TN72 GPS Receiver. This harness includes all the necessary wiring to facilitate the installation of the TT21/TT22 Compact Transponders to a TC20 control head plus provides for TN72 GPS receiver integration.
