discrepancy: occasionally APU Master on gives no L.O.P. light. No crank..
Occasionally APU will crank to 20 percent, and then go to 19, 18, 17……
Three good starts. Add trouble lights. 1 good start. 1 start to 20 percent. Swap to aft ECU. Ready for starts
Access start switch. 33 milli ohms, consistent