Started testing wiring. Started with xxx PWR 2 (IBBS battery backup power). Tested all the grounds individually one at a time. Verified power to the GEA, GNX, GTR, GAD27, GAD29, GSU, GDU, GMC and GMU.
Then started testing power 1 connections by installing fuses in the avionics fuse block one at a time and verifying function of the same list of devices. Then started adding fuses to the main fuse block and checking power and ground to additional devices such as the G5, GSB (USB) charging port, landing light power to the GAD 27, IBBS battery backup and CO detector. Installed temporary "master" switch between main battery and main fuse block since I won't wire in the master contractor until I install the panel in the airframe. Verified proper operation and switching between using main power and backup power.
Verified power connections through Autopilot circuit breaker to GSA pitch and GSA roll. Updated schematic to show circuit breaker names that match the labels on the panel.
Started testing all the connections to the avionics by temporarily connecting sensors (pressure, temperature) or resistors (temperature, position) or frequency generator to airframe wires to simulate connections to final sensors. Tested CHT/EGT, oil temp, oil pressure, fuel pressure, manifold pressure, RPM left and right, fuel flow, fuel level left and right, position of pitch, roll and flaps, Trim power, pilot and copilot trim inputs (up, down, left, right). Also confirmed operation of flap up/down switch, OAT sensor. Did not repeat testing of headset and microphone connections for pilot and copilot.