What was found
NR 1 PEC CAUTION, POWERPLANT MESSAGE ON ED, PROP 1 BETA SOL CB POPPED WHILE TAKING RUNWAY FOR TAKEOFF, POWER LEVERS WERE BELOW FLIGHT IDLE. TAKEOFF ABORTED. REMOVED 1 PEC CONNECTOR P20, CHECKED RESISTANCE OF GROUND BETA SOLENOID AND CIRCUIT PIN J TO J. COIL VALUE GOOD AT 58 OHMS. MANIPULATED HARNESS. NO CHANGE. RE-CONNECTED P20. REMOVED PEC AIRFRAME CONNECTOR P70, FOUND INTERMITTENT SOLID SHORT TO GROUND, .2 OHMS, AT PIN G WHILE MANIPULATING HARNESS INSPECTED HARNESS AND FOUND 2 CHAFED WIRES AGAINST BLEED AIR PRE-COOLER. REMOVED FIREWALL CONNECTOR P502 AND LOOSENED ALL ADEL CLAMPS BETWEEN P502 AND P70. 62200. REPLACED CHAFED WIRES IAW CMM 24-41-13 3542 5/21/16. RE-INSTALLED NR 1 PEC CHANNEL "A" HARNESS IAW MAINTENANCE 6710006. ALSO RAN NR 1 ENGINE AT VARIOUS POWER SETTINGS ABOVE AND BELOW FLIGHT IDLE GATE. OPS CHECK GOOD.