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Home >> Lincoln >> 2007 >> MKZ AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster And Panel Illumination >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test D: The Control Illumination Is Always On >> Normal Operation

Normal Operation

With the parking lamps or headlamps on, the smart junction box (SJB) supplies a pulse width modulated (PWM) voltage signal to the dimmable illumination sources on circuit VLN04 (VT/GY).

Possible Causes