Power Steering on the 456 does not work at any time. Steering pump is new and bled properly. Read this thread with interest: https://www.ferrarichat.com/forum/threads/steering-boost-comes-and-goes.500168/#post-144200836 Would like to know: When disconnecting the power steering ECU, should one expect power steering assist be full ON or OFF? When testing voltage @ speeds directly at the connector of the steering rack valve solenoid, is the test for voltage across the 2 terminals or to test terminals independently? Thank you!