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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 455 (Instrument Cluster Illumination And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: The Steering Wheel Switch Illumination Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

When the parking lamps are on, the Smart Junction Box (SJB) sends a pulse-width modulated voltage to the steering wheel switches. The voltage passes through the clockspring to the steering wheel harness and then to the steering wheel control switch(es).

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