What was found
AFTER BOTH ENGINES START ON PUSHBACK, PSEU LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURES AND PSEU LIGHT DID NOT EXTINGUISH WITH MASTER CAUTION RESET. GROUNDED - YES. ACCOMPLISHED PSEU BITE IDENTIFIED NON DISPATCHABLE FAULTS 31-52108 AND 31-52109. CYCLED A/C POWER. PSEU BITE NOW OK, NO FAULTS. SECONDARY INDICATION ELEC LIGHT ILLUMINATED WITH SPCU-1 FAULT. ACCOMPLISHED ELEC BITE PER FIM 24-31 TASK 801, FAULT CLEARED. ACFT OK FOR SERVICE REF FIM 32-09 TASK 801 FOR PSEU BITE CHECK.