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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1688 (Instrument Cluster And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Principles of Operation

Principles of Operation

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

The smart junction box (SJB) monitors the input from the instrument panel dimmer switch when the parking lamps are on. The SJB sends a pulse-width modulated (PWM) voltage to the dimmable components based on input received from the instrument panel dimmer switch. The SJB also sends a message over the medium speed controller area network (CAN) to the electronic automatic temperature control (EATC) (if equipped), the audio unit, and the instrument cluster to indicate the backlighting intensity level.

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