Troubleshooting guide

ARTEX AIRCRAFT SUPPLIES, INC. 570-1600
A ground may be connected at either the ‘panel end’ or the ‘ELT end’ of the harness, but both
locations should not be grounded. This prevents current flow thorough the shield from other
equipment (ground loop). A convenient ground connection is pin 9 of the remote switch
connector. This is connected internally to pin 6 (ground) and is provided for this purpose (see
Figures 10 through 13).
NOTE: If ground or other harness wire connections are broken or disconnected, the ELT
is still capable of automatic activation. However, the remote switch may be
incapable of resetting the ELT or operation may not be indicated on the remote
switch LED.
2.7.1 Harness Wiring – Remote switch end
1) If an Artex remote switch is already installed, verify contacts and ground and proceed
to “Harness ELT End”. For new installations, strip about 0.150” (3.8mm) of insulation
from the ends of each of the wires of the cable harness.
2) Crimp a female receptacle (P/N 151-6628) onto each wire using crimp tool (Molex #
0638191300, Waldom or Sargent # HTR-1719C).
3) Insert wires into appropriate positions of housing (P/N 151-5009) per Figure 9.
Information: Molex pin extraction tool is # 11-03-0002
4) Fabricate a fused power supply lead that connects to either pin 1 (+14V) or pin 3
(+28V).
5) Crimp a female receptacle (P/N 151-6628) onto the connector end.
2.7.2 Harness Wiring – ELT End
1) Cut a ground wire to length that will connect the 15-pin D-sub mating connector (P/N
150-1130) to ground. Cut a wire for the buzzer that will connect to the D-sub.
2) From connector back-shell (P/N 150-1127) select grommet from grommet ‘tree’ that
fits firmly around cable harness and the ground & buzzer wires. Slip grommet over
these wires with the smaller diameter shoulder towards the connector. Slide it away
from harness end so that it does not interfere when soldering the connector.
3) Solder a short jumper from pin 5 to pin 12 on the D-sub.
4) Solder the cable harness wires, buzzer wire and ground wires to D-sub pins. Pin 7
may require the attachment of two wires. It may be easier to splice wires, and then
connect a single wire to the pin. Consult AC 43.13.
5) On a flat surface, fit the connector w/attached harness into one-half of connector
housing positioning grommet so that it fits into recess at end of connector housing.
6) Install rectangular bracket washers onto thumbscrews, and then insert thumb screws
into lower housing half.
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