RE: Airtronics Servos to Futaba FASST Rx
There has to be 3 wires. Even on the Futaba's. The White wire on the Futaba is the signal wire. The red and black is simply power. The only futaba wire without a white wire should be the one from the switch harness that's supplying only power to the Rx.
On the old ATX servos, the wiring was Red, Black, Black (nice visual use of color eh??) Red - Pos, Black - Neg, and Black - Signal.
What servos are they? 94???