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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 342 (Steering Column Switches) >> Diagnosis And Testing >> Steering Column Switches >> Pinpoint Tests >> Pinpoint Test D: No Power in START >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition switch is placed in the START position, fused ignition voltage is sent to the internal logic of the Body Control Module (BCM) via the start and run/start circuits and the PCM via the start circuit. When the PCM receives voltage from the start circuit, it provides a voltage and ground to the starter relay coil circuits to activate the starter relay. Once the starter relay is activated, voltage is supplied to the starter solenoid through Battery Junction Box (BJB) fuse 89 (40A).

This pinpoint test is intended to diagnose the following: 

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