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Home >> Lincoln >> 2006 >> Zephyr >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster And Panel Illumination >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: The Control Illumination Does Not Dim >> Normal Operation

Normal Operation

With the parking lamps or headlamps ON, the smart junction box (SJB) sends a voltage reference signal through circuit VLN18 (BU/WH) to the instrument panel dimmer switch. The return signal is sent through circuit CLN27 (WH/BN) back to the SJB. The SJB then supplies a pulse width modulated (PWM) voltage signal to the dimmable illumination sources on circuit VLN04 (VT/GY).

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