What was found
ENGINE 1 ALTERNATE POWER CHANEL B CIRCUIT BREAKER POPPED. GROUNDED - YES. MSG 73-10131 & 73-11281, COMPARED RESISTANCE CHECKS A & B AT ALTERNATOR & J7 & J8 AT EEC, NO DEFECTS NOTED REF B737-800 FIM 73-27 TASK 804. AS SOON AS EEC BITE IS INITIATED CH B C/B POPS, EVEN WITH CH B CONNECTOR AT ALTERNATOR OFF. REMOVED & REPLACED #1 ENGINE EEC REF B737-800 AMM 73-21-60. ALT DEACT USED REF CH 5-07-01 ITEM 1, 8, 9 HAS BEEN REVERSED, ALL INSTALLATION TEST PASSED.