Connector And Backplate Assembly For Gtx 335 - Garmin GTX 335 w GPS Installation Guidance

4.3.9

Connector and Backplate Assembly for GTX 335

CAUTION
Damage can occur to the wiring if the screws used to ground the shields to the shield block
are too long. Make sure a sufficient length is present without protruding into the wire
bundle.
Refer to table 4-5 for GTX 335 connector kit hardware.
The backplate varies depending on the possible unit and mount selections. Backshell connectors give the
installer the ability to terminate shield grounds at the backshell housing using the Shield Block ground kit.
1. For all 22 gauge and smaller unshielded wiring, strip wire 0.17" from the end and crimp pins
(P/N 336-00021-00) onto the wires.
2. Insert all (shielded and unshielded) terminated wires into the connector(s) in accordance with the
aircraft wiring diagrams.
3. Attach the Shield Block to the backshell(s) by inserting the flathead screws through the holes on
the Shield Block and threading into the tapped holes on the backshell.
4. Wrap the cable bundle with Silicone Fusion Tape at the point where the backshell strain relief and
cast housing will contact the cable bundle.
5. Place the smooth side of the backshell strain relief across the cable bundle and secure using the
three screws. Make sure each half of the strain relief bar is supporting half of the cable bundle.
6. Attach the cover(s) to the backshell(s) using two each screws.
7. Terminate the ring terminals to the shield block by placing items on the pan head screw in this
order:
a. lock washer
a. flat washer
a. first ring terminal
a. second ring terminal, if needed before finally inserting the screw into the tapped holes on the
shield block.
8. Insert the assembled connector into the backplate.
Refer to table 4-5 for the list of connector kit items, dependent on which unit is used.
Refer to figure 4-8 for the connector kit assemblies.
190-00734-17
Rev. 1
GTX 335 w/GPS Installation Guidance
Page 4-15