whelen 650 install Another successful Whelen 650 strobe install

[willerjim273]

Install went fine. All is working great. No tail strobe on that year. Sure did not take an "hour", more like 6 if is you first time. Biggest work around for me was getting something for the strobe housing to screw into. I will put some pics down below. Question I have is right now the yellow wire is not attached. Given just wing strobes, If I attach both yellow wires- the sync wires, how does the "brain" know how to sync them? Just curious, I am guessing the old power packs took care of that job. Is the circuitry built into the strobes? Does the yellow wire just interrupt the ground for a split second? 

[carusoam]

Question for @OSUAV8TER above!

-a-

[Warren]

The yellow wires allow the strobes to communicate/sense the other strobes and synchronize.  It can be a real project to pull new wires if these weren't in your original plane.  In the Mooney installs I have done, I have repurposed the ground wire from the nav or strobe light and used that for the sync wire. These grounds run back to the instrument panel and to a connector behind the engine controls.  It is relatively easy to remove the ground from the mating connector and make a jumper to connect the grounds to each other.  In planes with tail strobes, all three lights will have ground wires running to this point.  If there is no tail strobe, you need to run a sync wire from the rear light if desired -- definitely not worth it unless you have the plane opened up for other work.