Garmin GDL 69/69A Installation Manual - page 21
Installation Procedure
GDL 69/69A Installation Manual
Page 2-5
190-00355-02
Revision E
2.5 Cabling and Wiring
Wiring should be installed in accordance with AC 43.13-1B Chapter 11. When wire separation cannot be
achieved, the following issues should be addressed:
• The cable harness should not be located near flight control cables and control, high electrical
capacity lines or fuel lines
• The cable harness should be located in a protected area of the aircraft
• Do not route cable near high-energy sources
Refer to the interconnection diagrams in Appendix D for the appropriate wiring. Once the cable
assemblies have been made, attach the cable connector to the rear of the rack. Route the wiring bundle as
appropriate. Use 22 or 24 AWG wire for all connections except for power. Use 22 AWG for
power/ground. Avoid sharp bends.
After the cable assemblies are made assemble the backshell as shown in Figure 2-6. Then install the
backshell connector to the rear plate using the screws provided in the connector kit. After the rack is
installed, assemble the rear plate into the rack.
2.5.1 Wiring
Harness
Allow adequate space for installation of cables and connectors. The installer supplies and fabricates all of
the cables. Except for the antenna connection, all electrical connections are made through a 78-pin D-
Subminiature connector provided by Garmin. Construct the wiring harness according to the information
contained in this and the following sections. Cable lengths will vary depending upon installation. Strip
all wires going to the 78-pin D-Sub connector 1/8”. Insert the wire into the pin and crimp with one of the
recommended (or equivalent) crimping tools. Insert the pin into the 78-pin D-Sub connector housing
location as specified by the interconnect drawing in Appendix D. Verify the pin is properly engaged into
the connector by gently tugging on the wire. Route and secure the cable run from the GDL 69/69A to the
other units away from sources of electrical noise.
Section 3 defines the electrical characteristics of all input and output signals. Required connectors and
associated hardware are supplied with the connector kit. See Appendix D for interconnect wiring
diagrams.
CAUTION
Check wiring connections for errors before inserting the GDL 69/69A
into the rack or mounting bracket. Incorrect wiring could cause
component damage.
Table 2-2. Pin Contact Part Numbers
Wire Gauge
78 pin connectors (P691)
22-28 AWG
Garmin P/N
336-00021-00
Military P/N
M39029/58-360
AMP 204370-2
Positronic MC8522D
ITT Cannon
030-2042-000