Today I spent a few hours working on the main power harnesses. Since I’m using the Vertical Power VPX, all the power wires connect to a central distribution point including the panel switches. It’s all very straightforward once you have the pins all planned out.

Here’s the VPX mounted under the panel (it’s all upside down) so that I could reference the two D25 connectors for J1 and J2. The J8 connector, as well as the J10 and J12 connectit’s on the other side are used for the larger power distribution, whereas the J1 and J2 connectors are for switches (connects to ground), flap position sensor, and serial Tx/Rx for communicating with the EFIS.

Here’s the backside of the J12 connector. Not all the pins are used, and they are left empty. I used my heat shrink tubing labeler to mark each wire for each of the five connectors.

Here are all five of the main power harnesses completed. The final wire runs will need to be done in the plane, but that won’t take too much effort once I rivet in the sub-panel and can start installing components. There are 50 wires here that each are labeled with their respective pins and connectors in order to easily route and attach to the correct components. I genuinely enjoyed this work and look forward to more of the avionics installation and wiring!