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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1112 (Instrument Cluster (Ic), Message Center, And Warning Chimes) >> Diagnostic Tests >> Instrument Cluster (IC) and Warning Chimes >> Pinpoint Tests >> Pinpoint Test J: The Brake Warning Indicator is Never On >> Normal Operation

Normal Operation

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The instrument cluster (IC) uses 3 strategies to operate the brake warning indicator: parking brake status, brake fluid level, and the base brake system integrity. When the parking brake is applied, circuit 162 (LG/RD) to the instrument cluster (IC) is grounded by the parking brake switch through circuit 57 (BK). The instrument cluster (IC) receives the ground signal and illuminates the brake warning indicator. The instrument cluster (IC) receives the brake fluid level status from the brake fluid level switch through circuits 512 (TN/LG) and 531 (DG/YE). When the instrument cluster detects the brake fluid level switch is disconnected, or the brake fluid level is low, the instrument cluster (IC) illuminates the brake warning indicator.

NOTE: The brake fluid level switch is part of the master cylinder and is not installed separately.

This pinpoint test is intended to diagnose the following:

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