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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 744 (Instrument Cluster System And Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: The Steering Wheel Control Switch Illumination Source Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Variable pulse width modulated (PWM) voltage is supplied to the steering wheel audio and climate control switches and the speed control switches through circuit 1011 (TN/OG). Ground is supplied to the steering wheel control switch from the powertrain control module (PCM) through circuit 848 (DG/OG).

Possible Causes

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