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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1967 (Instrument Cluster System And Panel Illumination (F250-F550)) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test A: The Control Illumination Is Inoperative/Always On >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Voltage is supplied to the headlamp switch through circuit 195 (TN/WH). When the headlamp switch is in the PARKING LAMPS or HEADLAMPS ON position, voltage is sent to the instrument panel dimmer switch, from the headlamp switch, on circuit 14 (BN). Using electronic circuitry, the instrument panel dimmer switch generates a variable pulse width modulated (PWM) signal that is sent to the instrument cluster and dimmable switches on circuit 19 (LB/RD).

Possible Causes

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