Maintenance Manual 190-02472-02G3X Touch EFIS Part 23 AML STC Revision 2Page 525.12.4 GTP 59 HarnessThe GTP59 is an OAT sensing device. The connection to this LRU is made via pre-installed lead wires and itis acceptable to use crimp splices to extend the lead wire harness to the GSU. The pre-installed lead wiresare ten feet in length. Reference Table 5-18 for lead wire functions. For specific wiring information refer toG3X Touch EFIS Part 23 AML STC Installation Manual (190-02472-01).Table 5-18 – GTP 59 Lead Wire FunctionsPIN WIRE I/OWHITE TEMP PROBE POWER IN INBLUE TEMP PROBE OUT HI OUTORANGE TEMP PROBE OUT LO OUT5.12.5 GAD 27 Aircraft Harness/LRU ConnectorsThis section describes the GAD 27 aircraft harness and the interface connectors on the GAD 27. The GAD27 connector designation is J271 and the aircraft harness connector is designated as P271. GAD 27connector J272 is not used. GAD 27 also has a terminal block TB273.5.12.5.1 Aircraft Harness Connector P271The aircraft harness connector P271 is a 50-socket D-sub plug connector and interfaces to the GAD 27connector J271. A pinout arrangement of J271 is shown in Figure 5-15 and connector pin functions areshown in Table 5-19.Figure 5-15 – View of J271 Connector on the GAD 27Table 5-19 – P271/J271 Pin FunctionsPIN PIN NAME/FUNCTION I/O1 CAN HI I/O2 CAN LO I/O3 CAN BUS TERM --4 GAD 27 POWER GND --5 RESERVED --6 RESERVED --7 RESERVED --8 GAD 27 POWER GROUND --9 RESERVED --10 RESERVED --11 RESERVED --12 RESERVED --
