Question about 2000 Chevrolet Blazer

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Lights i have a 2000 Blazer that i know the DRL has the headlights on during the day and switches over to normal headlights at night, but i noticed all the exterior lights are on all the time now. What could be causing the problem? Thanks for the help.

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Try to futz with the dimmer switch for the interior jiggling it see if you get them to even flicker.. if that's it then replace the switch. this happens often to. Check your relays make sure they are OK. Take a gander for burnt wires ETC down there etc. im not to sure as to how to do this but look in your driving manual and see how you change the light settings and try turnning the lights back to manal and see if that helps.. if that helps its the sensor on the dash thats causing the confusing.

Posted on Aug 08, 2008

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Posted on Jan 02, 2017

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On my 1999 Olds Intrigue I have never had to turn on my lights at night. All night time driving lights come on automatically until recently. Now only the headlights come on.To get the dash lights,tail...


Without testing i would say you have DRL control module problem , But that would just be a guess .
In the night mode, the DRL ambient light sensor senses darkness. Then, the DRL module turns off the front turn lamps and turns on the headlamps through circuit 10. The DRL module also turns on the park, side marker, license, and tail lamps. If the engine should stall with the DRL control module in the night mode, the DRL control module will turn off the headlamps and leave the side marker, park, license and tail lamps on while the engine is being cranked. The headlamp switch operates as usual.
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The brightness of the Vacuum Fluorescent (VF) displays is controlled by two signals: the park lamps on signal (circuit 230) and the VF dimming signal (circuit 308). With the park lamps on, the VF display of the radio, heater, A/C control (with RPO CJ2) and the instrument cluster will dim for nighttime viewing. When the park lamps on signal is not present (park lamps off), the VF displays are at high brightness for daytime viewing. When the park lamps are on, the I/P lamp dimmer switch provides a signal (VF Dimming Signal circuit 308) which controls the brightness of the VF displays when the I/P lamp dimmer switch is adjusted.

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You can't turn them on manually with the switch . You have the switch set on auto ?
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