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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1098 (Instrument Cluster System And Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test B: The Control Illumination Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The instrument cluster monitors the medium-speed controller area network (MS-CAN) bus on circuits 1848 (PK/OG) and 1847 (WH/OG) for a PARKING LAMPS ON or HEADLAMPS ON message. The PARKING LAMPS ON or HEADLAMPS ON message is generated by the smart junction box (SJB). When the instrument cluster detects a HEADLAMPS ON message, it sends a variable voltage to the module-controlled illumination sources through circuit 19 (LB/RD). The module-controlled illumination sources are grounded through circuit 57 (BK).

Possible Causes

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