What was found
EXTERNAL POWER SYSTEM REPORTED INOPERATIVE. FOUND PC BOARD SOAKED WITH DEICE FLUID AND RESISTOR SHORTED. INSTALLED REPAIRED PC BOARD. EXTERNAL POWER LIGHT INOPERATIVE. TROUBLESHOT AND FOUND WIRE BROKEN OFF TERMINAL ON NEW BOARD AND ALL OTHER WIRES CORRODED AT TERMINAL. ALSO, FOUND WIRES FROM EXTERNAL PLUG TO PC BOARD CHAFED THROUGH AT LIGHTING HOLE. SPIRAL WRAP STRETCHED AND DID NOT DO ITS JOB. REPAIRED AND RETURNED TO SERVICE.