Jabiru J450 Constructors Manual
Post-Paint>Fuselage>Install electrical wiring
Tuesday, April 6, 2010
235 of 343
Fit the VHF radio wiring harness
The Aircraft Harness pack includes the wiring
harness and all of the necessary hardware: the
Push To Talk (PTT) buttons for the control stick
and the headset jacks for the top of the cross
beam outboard of the seat backs. All wires are
clearly labeled and the headset jacks are colour
coded as well for ease of installation. The harness
goes through the console and exits in 2 places:
the PTT wires exit under the control stick and the
headset wires exit each side of the console behind
the seats. The multi-pin plug connects to the
digital harness behind the panel so leave the plug
about 400mm above the console. Note that in all cases the grey wires are the earth wires.
Use a flexible rod inserted from the access hole behind the seats to draw these wires back
through the console, then work through the access hole in the side of the console to feed the
control stick PTT wires only around and out of the hole under control column as shown
arrowed below right. Fit a rubber grommet to the hole first to prevent chafing of the wires.
For a dual stick: feed both groups of PTT wires
up and into the left underside of the control stick,
taking the Pilot group up the left hand side and
the Co-Pilot group up the right hand side.
For a single stick: feed the Pilot group up and
into the stick and route the Co-Pilot group into
the right seat base. You will need to cut an access
hole under the right-hand seat in this case.
Both groups contain 2 pairs of wires: the blue and
gray wires are for the PTT button while the green
and gray wires are for the optional remote
memory feature. Route the wires as shown in the
photo at right, leaving enough room for full and
free movement of the control stick.
Fit the wires to the PTT buttons and push the PTT buttons into
the top of the control stick, or in the case of a single stick fit
the Co-pilot‟s PTT into the front of the right seat base.
Separate the pilot and co-pilot headset wires (both sets are
labeled as shown at right) and route them out of holes in either
side of the console across behind the seat back to the jack
locations. Strip the ends of the wires and solder them to the
tags on the jacks, (the jacks are colour coded to match the
wiring) and then fit the jacks into place.
We suggest that you mount the jacks in the top of the beam
between the seat back and the side of the fuselage. This tends
to keep the headset wires out of the way in flight.
Zip tie the wires up under the rear lip of the beam – drill 3
holes along the bottom of each seat back for the zip ties.