What was found
(CAN) DURING SRVICE CHECK, WITH NO A/C POWER & BATTERY SELECTED TO DC, THE AMP METER WENT TO 40 AMPS, AFTER APU START, THE D.C. AMPS METER STOCKED AT 100 AMPS. FOUND HIGH RESISTANCE BETWEEN TERMINAL B2 AND A2 OF R1 BATTERY BUS RELAY, WHEN RESISTANCE SHOULD HAVE BEEN INFINITE. REPLACED RELAY ALSO AS A RECAUTIONARY MEASURE, THE BATTERY AND BATTERY CHARGER WERE REPLACED. SYSTEM FUNCTIONALLY TESTED AND FOUND SERVICEABLE.