Question about Chevrolet Monte Carlo

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I have a 2002 Monte Carlo SS. It has a light sensor, during the day the dashboard cluster lights up as does the radio. At dawn, dusk or night, they do not light up even when I pull the headlight switch. I only have the car a couple of months, and it just started doing this a week ago. Is there possibly a short in the switch? I checked all my fuses, and can't seem to find a bad one.

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The sensor is most likely the culprit. It is photosensitive - and prone to failure if parked outside in the sun alot. (the sensor is called a Surveillance Mode Switch)

If it were a Fuse or Relay - the lamps would not light at all - they share the same power source... 7.5A PANEL DIMMING fuse.

My schematic shows your dimming is actually controlled by the BCM (Body Control Module) with the supplied signal from the Light Sensor.

If the Light sensor is OK - your BCM has developed a problem, and is not serviceable - it must be replaced.

Thanks for using FixYa!!

Posted on Jul 03, 2009


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Posted on Jan 02, 2017


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