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Home >> Ford >> 2012 >> Econoline Base, Van Cargo >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (OEM Component Testing) >> Component Testing >> Illumination dimmer switch >> Component testing procedure
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Component testing procedure

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COMPONENT TESTING PROCEDURE CHART

Circuit to test Connect self-powered test light or ohmmeter terminals Move switch to these positions A good switch will indicate
Interior lamps circuit 4 and 2 Off Open circuit
Dome Closed circuit
Illumination dimmer resistor 4 and 1 Rotate knob Ohmmeter will show smoothly increasing/decreasing resistance