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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 885 (Steering System - General Information) >> Diagnostic Tests >> Steering System - Hybrid >> Pinpoint Tests >> Pinpoint Test F: DTC C1778 - Power Steering Failure >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The power steering control module receives voltage through circuits 838 (LG/VT) and 601 (LB/PK) and ground through circuit 57 (BK). The power steering control module then sends a signal to the power steering motor through circuits 3140 (BK) and 3141 (WH). The power steering control module sends varying amperage through these circuits dependent upon the desired output to the power steering motor.

Possible Causes

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