DTC B1304: Electronic Power Assisted Steering System: Description
WARNING: This page is about a different car, the 2013 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
The power steering control module (PSCM) is supplied voltage through one high current and one low current circuit. The low current circuit is dedicated for PSCM module power. See Pinpoint Test A: DTCs B1304 and U3003: Electronic Power Assisted Steering System and Battery Voltage - Circuit Voltage Below Threshold, Circuit Voltage Above Threshold and Event Information