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Home >> Lincoln >> 2009 >> MKS FWD >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Cluster Illumination & Instrument Panel Illumination >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test D: The Steering Wheel Control Illumination Is Inoperative >> Normal Operation

Normal Operation

The Smart Junction Box (SJB) sends a Pulse Width Modulated (PWM) voltage to the steering wheel controls through circuit VLN37 (BU/WH) to the clockspring. The voltage passes through the clockspring to the steering wheel harness and on to the steering wheel controls. Ground is supplied through the clockspring and circuit GD116 (BK/VT).

This pinpoint test is intended to diagnose the following: 

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