What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: WHILE IN CRUISE FLIGHT AT FL330, ICING CONDITIONS WERE ENCOUNTERED AND ENGINE ANTI-ICE WAS TURNED ON. THE NUMBER 1 ENGINE BLUE COWL VALVE OPEN LIGHT ILLUMINATED BRIGHT AND DID NOT DIM. SHORTLY THERE AFTER, THE AMBER INDICATION ILLUMINATED ABOVE THE ENGINE NUMBER 1 N1. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT CLT. REMOVED AND REPLACED ENGINE HARNESS MW0313, PER AMM 71-51-03-400-801-FOO, LEAK AND OPERATIONAL CHECKS COWL ANTI-ICE NUMBER 1 ENGINE GOOD.