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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1025 (Instrument Cluster And Panel Illumination -- F150 Pickup) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Test D: A Single Illumination Source Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

For dimmable backlighting, when the headlamp switch is placed in the ON position, voltage is supplied to the dimmer switch through circuit 14 (BN). The dimmer switch then sends a variable voltage to the backlighting control system through circuit 19 (LB/RD). Ground is supplied to the backlighting control system through circuit 57 (BK).

For non-dimmable backlighting, when the ignition switch is placed in the RUN/START position, voltage is supplied to the illumination sources from the accessory delay relay through circuits 400 (LB/BK) and 54 (LG/YE).

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