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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1396 (Instrument Cluster Illumination & Instrument Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Principles of Operation >> Hardwired Dimmable Illumination

Hardwired Dimmable Illumination

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).

When the parking lamps or the headlamps are on, the SJB monitors the input from the instrument panel dimmer switch. The SJB sends a pulse-width modulated (PWM) voltage to the dimmable switches and control components based on input received from the instrument panel dimmer switch.

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