Re: 2008 cobalt daytime running lights not working
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.
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Have you had vehicle check for DTC'S diagnostic trouble codes . Check fuse's an relays , find wiring diagrams to see what controls these systems ?
Radio/Battery fuse , fuse G 10 amp located in the right instrument panel fuse box . Do you know where this ?
Fuse Block - Right IP - On the right side of the instrument panel
An there is one on the other end of the instrument panel ,driver side .
Fuse Block - Left IP- On the left side of the instrument panel The fuel an temp . gauges not working is probably the step motors inside instrument cluster . GM had problem with this 03 to 06 . How to repair GM Instrument Cluster Speedometer Gauge Stepper
Daytime Running Lamps (DRL)
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.
DRL operation in Manual Transmission equipped vehicles will occur when the ignition switch is in the ON position, and the parking brake is released. - check fuse's an relay first.
Door Lock System Components
The power door lock system consists of the following components:
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Driver door lock switch
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Front Passenger door lock switch
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Body Control Module (BCM)
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Relays: Driver Door Unlock--if equipped, Door Unlock, and Door Lock
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 .
Daytime Running Lamps (DRL)
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.
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.
www.hyundaiforum.com > ... > Vehicle Line Up > Hyundai Accent
Apr 25, 2008 - Join Date: May 2007 ... Basically, I've noticed my DRL are no longer working. ... Does anyone know what does the DRL module looks like and where I could find it? ... 04 Daytime running lights, CaptAthlon, Hyundai Elantra, 9 ...
There is a microprocessor in the instrument cluster that grounds the DRL relay - do you know if the relay has power from the headlight fuses and is being grounded by the processor ?
Hello! I'm going to shoot the trouble assuming that the vehicle has Daytime Running Lights (DRL)...If the vehicle does not have DRL let me know...Guru...Saailer
Yes your daytime running light just uses the headlight bulb on a lower voltage so if the headlight is not working the drl will not work as well, they are dirrectly related,,check the head light fuse,and check to make sure the bulb is good,,
If you have daytime running lights but when you turn on your regular headlight on they do not come on. Take the bottom of your steering column off (Two Small Screws) and look at the back of your turn/dimmer switch make sure that the light blue wire is connected. The wires will break off after years of raising and lowering your steering column.
Dash lights were falsing ? I assume you mean pulsing .
driving lights come on ? daytime running lights or park lamps ,does the vehicle have daytime running lamps . Daytime running lamps module .
Daytime Running Lamps (DRL) Module (Headlamp Auto Control Module)
Mounted behind the radio and the HVAC control, left of the instrument panel compartment.
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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