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1. Non-Garmin part numbers shown are not maintained by Garmin and consequently are subject
to change without notice.
2. Extracting the #18 and #20 contact requires that the expanded wire barrel be cut off from the
contact. It may also be necessary to push the pin out from the face of the connector when using
an extractor due to the absence of the wire. A new contact must be used when reassembling
the connector.
3. For applications using 16 AWG wire, contact Garmin for information regarding connector
crimp positioner tooling.
3.3
Backshell Assembly
The GRS 77 connector kit includes a Garmin backshell assembly. The backshell assembly houses the
configuration module. Garmin's backshell connectors give the installer the ability to quickly and easily
terminate shield grounds at the backshell housing using one of two methods available. To assemble the
backshell and grounding system, refer to instructions provided in the SPIDER Installation Instructions
(190-00313-03) or Shield Block Installation Instructions (190-00313-09).
The SPIDER grounding method is permitted for previous installations, however Garmin
recommends the use of the Shield Block grounding method for all new installations.
Page 3-2
Revision L
NOTES
NOTE
GRS 77/GMU 44 Installation Manual
190-00303-10
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