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Zenith 750 Cruzer Here's some progress shots of my electrical wiring. It's not complete yet, but the EFIS is connected and works, the flaps work correctly with the up/down switch, and the transponder, ADSB, and EMS are all wired.

I have the beacon wired, but no other lights yet.

   
Zenith 750 Cruzer The main thing to think about is that eventually the top glareshield will get closed up and riveted and none of this be accessible except while laying upside down on the seats looking under and behind the panel!

That is why the boxes are mounted on the bottom of the L angles.

Thinking about future maintenance, I have added nutplates to these nylon clamps so that I only need to get a screwdriver on the bolt-no need to try to get to a nut.

   
Zenith 750 Cruzer This is where it all starts. This is the DISTRIBUTION BUSS. The 8 AWG wire comes from the master relay so that when I turn on the master switch, this buss is powered. Moving over one stud is the AVNCS MSTR. The curved white 10AWG wire goes to a relay (controlled by the avncs mstr switch) and the other 10AWG wire comes out of the relay and powers the AVNCS BUSS.
   
Zenith 750 Cruzer The AVNCS BUSS is circled in red and is a fuse block. It powers the comm, transponder, ADSB, AHARS, iPad, and a future USB port.

Moving over one more stud in the pic above is a 10AWG wire to the MAIN BUSS. This buss is another fuse block (circled in green) and powers the nav, strobe, recog, and beacon lights, flaps and the oil and fuel pressure sensors.

So as soon as I turn on the master switch, the distribution buss and the main buss are powered.

   
Zenith 750 Cruzer The last stud on the distribution buss has another 10AWG wire going to the essential or ESS BUSS. This is the buss that powers the stuff that's essential to keeping the engine running-ECU, PUMP 1, PUMP 2, and the EFIS.

This EFIS is not really essential, but I used a circuit breaker for it anyway.

   
Zenith 750 Cruzer Still tons of wiring left to do.
   
Zenith 750 Cruzer This is the flap switch. I turned the master on and ran the flaps both ways and it is wired correctly.
   
Zenith 750 Cruzer ECU cables. The loop with the yellow heat shrink is not used. Instead of cutting it off, I just rolled it and zip tied it.
   
Zenith 750 Cruzer Back of the HDX. The open DSUB on the back of the HDX will connect to the radio head which is just to the left (in the pic) of the HDX.

Dynon sent me a 3 foot cable but I'm going to return it and use a 1.5 foot network cable. No use trying to curl up an extra foot and a half of cable I don't need!

   
Zenith 750 Cruzer Wiring harness is taking shape, but there's still a lot of wires to add.
   

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