Question about Chevrolet Cobalt

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2008 cobalt daytime running lights not working

Headlights work DRL don't

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  • rflup Nov 04, 2008

    thanks for the assist.I tried but had to bring to dealer. Turns out it wasd a short in the fuse box under hood which had to be replaced.



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Check to make sure your parking brake is not partially engaged. If the parking brake is engaged even to one click off from the released position the DRL module will be disengaged. Also there may be a problem with the parking brake position sensor which is responsible for determining if the parking brake is partially engaged.

Posted on Nov 02, 2008

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2003 Chev Malibu. Radio inop with key in on position, auto systems not working, I.e. daytime running lamps, auto lock and drivers unlock, fuel and temp gauges not working.


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The power door lock system consists of the following components:
?€¢
Driver door lock switch


?€¢
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?€¢
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I need clarification on 2003 Chev Malibu DRL problems:


That piece you think is a ceramic DRL module is a resistor , When in DRL mode voltage to the low beam headlamps circuit goes through that resistor dimming the headlamps from low beam to daytime running lamps . It sounds to me like you need a new resistor ,but without doing some electrical testing it could be a lot of things . The DRL relay in the under hood fuse box could have a problem , could be the BCM - body control module , the ambient light sensor etc... Here is how daytime running lamps work .
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The ambient light sensor is a light sensitive transistor that varies its voltage signal to the body control module (BCM) in response to changes to the outside (ambient) light level. When the BCM receives this signal it will either turn on the daytime running lights (DRL) or the headlights. Any function or condition that turns on the headlights will cancel the daytime running lamps operation. With the headlight switch in the OFF position, the headlights will either be turned ON or OFF, after an approximate 30 second delay depending on whether daylight or low light conditions are sensed. The HTR A/C IGN fuse in the underhood junction block supplies ignition positive voltage to the daytime running lamp (DRL) relay coil circuit. The DRL relay switch contacts are connected to the low beam circuit. When the headlamp switch is placed in the OFF position, the BCM will either turn on or off the daytime running lamps, depending on whether daylight or low light conditions are sensed. The BCM energizes the DRL relay, closing the switch contacts and grounding the low beam circuit. Ground is provided at G101. The DRL illuminate the low beam headlights at a reduced intensity. The DRL will operate when the ignition switch is in the ON position, the gear selector is not in the PARK position and the parking brake is released. When these conditions have been met and the ambient light sensor indicates daytime conditions, the DRL will illuminate.

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How to disable DRL (Daytime Running Lights) - TucsonDrivers.com

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Oct 17, 2006 - I wonder why Hyundai didn't put it on the US models? ... I wish my Tucson had daytime running lights. ... The DRL module on the Tucson in Canada basically puts 12 volts on ... #8 Postby Hermine » Wed Jun 20, 2007 5:39 pm.

Daytime Running Lights (DRL) not working =( - Hyundai Forum ...

www.hyundaiforum.com > ... > Vehicle Line Up > Hyundai Accent
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