Plans, Wire Diagrams, and Documentation 1/1/23 - 5.0h The ADAHRS wire harness (WH-00012) that is supplied with the wing kit is designed to connect to the Dynon ADAHRS or the Garmin GMU 22 magnetometer. I planned to install a GMU 11 magnetometer in place of the GMU 22, which requires a change to the wire harness. The primary difference is the fact that the GMU communicates with the Garmin avionics via the CAN bus, while the GMU 22 uses a RS-232 communication network. That difference cascades into a number of electrical and mechanical changes to the plans. I reached out to Steinair about building a new WH-00012 for the GMU 11. Steinair responded very quickly with a recommendation to go with the GMU 22 per the plans. They confirmed that the RV-14 electrical and mechanical systems were designed for the GMU 22, and going with a GMU 11 introduces a lot of changes. In addition to sticking with a proven design, the GMU 22 removes the CAN bus from the left wing, which shortens the CAN bus overall length (limited to approximately 60 feet), and allows the CAN bus to be terminated at the roll servo in the right wing and the pitch servo in the tail. GMU 22 it is! WH-00012 (ADAHRS/Magnetometer Harness) Pin Out: - - C403J Pin 1 (F406, 22S AWG, WHT/RED) - - - WH-00107, Pin 8 - - - Garmin GMU 22 RS-232 In - - C403J Pin 2 (F404, 22 AWG, WHT/GRN) - - - WH-00107, Pin 9 - - - Garmin GMU 22 +12V Power - - C403J Pin 3 (F406, 22S AWG, RED) - - - WH-00107, Pin 4 - - - Garmin GMU 22 RS-485 A - - C403J Pin 4 (F403, 22 AWG, BLU) - - - WH-00107, Pin 5 - - - Garmin GMU 22 Not Used - - C403J Pin 5 (W401, 22 AWG, BRN/YEL) - - - Stall Warning Switch (Spade Connector) - - C403J Pin 6 (F405, 22 AWG, WHT/BLU) - - - WH-00107, Pin 6 - - - Garmin GMU 22 Power Ground - - C403J Pin 7 (F406, 22S AWG, WHT/BLK) - - - WH-00107, Pin 2 - - - Garmin GMU 22 RS-485 B - - C403J Pin 8 (F406, 22S AWG, BLK) - - - WH-00107, Pin 7 - - - Garmin GMU 22 Not Used - - C403J Pin 9 (F402, 22 AWG, GRN) - - - WH-00107, Pin 3 - - - Garmin GMU 22 Shield Ground (RS-232) - - C403J (F784, 22 AWG, GRN) - - - WH-00107, Pin 1 - - - Garmin GMU 22 Shield Ground (RS-485) Wire and Connector Labeling, and Testing 1/2/23 - 0.4h [Label Maker, 1/4” and 3/8” Heat Shrink Tube Labels, Heat Gun, Multimeter] Wire Harness Installation 1/2/23 – 0.2h The ADAHRS/magnetometer wire harness (WH-00012) is relatively short and easy to install in the left wing. The molex plug snaps into the top receptacle, and the wires get routed through the snap bushings to their final destination.