GDU 37X Installation Manual Page 2-5190-01054-01 Revision C2.5 Installation ConsiderationsFabrication of a wiring harness is required. Sound mechanical and electrical methods and practices arerecommended for installation of the GDU 37X. Refer to Section 1.6 for wiring considerations, AppendixA.1 for pinouts.Connector kits include backshell assemblies. Garmin’s backshell connectors give the installer the abilityto quickly and easily terminate shield grounds at the backshell housing. The instructions needed toassemble the backshell connector w/Shield Block grounding system are located in Appendix B.The GDU 37X rear connector (J3701) is electrically isolated. For installationsusing shielded cables, a ground pin must be tied to the connector shell.2.6 Mounting RequirementsRefer to Appendix C for outline and installation drawings.2.7 Unit InstallationThe GDU 37X is installed by holding the unit flush with the instrument panel and fastening the fourcaptured 3/32” hex socket head screws to the panel as shown in Figure C-1.1 and C-1.2.2.8 Continued AirworthinessMaintenance of the GDU 37X is “on condition” only. Periodic maintenance of the GDU 37X is notrequired. Instructions for Continued Airworthiness (ICA) are not required for this product under 14 CFRPart 21 since the GDU 37X has received no FAA approval or endorsement.NOTE
