automatic head lights

[johns07051]

being a new corvette owner of just three weeks i have a problem with my automatic head lights, thay don't come on when it gets dark while i'm driving but will work if the car is off and i start it when it is dark.has any one else had this problem?i would appreciate any advice

 

[ddtman]

Headlights

Did you set the Twilight Sentinel to on?

 

[johns07051]

yes the twilight sentinal is on, when the car is started in my garage the lights will open go on when it's backed out into the daylight the sensor will turn the lights off,my problem is when the car is running and it gets dark the lights do not come on

 

[Tuna]

What is the 'delay' set to?

 

[johns07051]

auto headlights

the delay is set at three bars or 36sec.

 

[Tuna]

Hummmm!

Since you say they open correctly in the garage and close shortly after leaving the garage, it would seem that the light sensor is getting a false reading that it is still light outside side long after you think they should be on.

That is beyond my knowledge now. Hope you figure it out soon.

 

[fhturner]

First off, do you have any Diagnostic Trouble Codes set in your Driver Information Center? Please post them if you do, along with which control modules (BCM, PCM, etc.) they came from. If you don't know how to find these, check out the KnowledgeBase:

http://corvetteactioncenter.com/kb/question.php?qstId=242

Next, a few questions from the flow chart (well, table, actually...) in the service manual:

2. Do the Daytime Running Lamps turn on in daylight conditions?
3. Do the DRLs turn off in low light conditions?

If NO for #2:
16. Is the brake warning indicator always on?

If you can answer these questions, we'll have more to go on and help you with. Please check on these things and post back. Good luck!

Fred

 

[johns07051]

auto headlights

fred ,sorry i took so long to answer your questions,
1-when i checked the codes all that showed were history none were current what showed were Bo-RFA c-2110,U1064,U1016,
A1-RDMCB-2252,A0-LDCM-2252 all were history

2-yes the DRL are on when it's ligth

3-yes thay do turn to just parking lights when it's dark

4-the break warning light is not on

thanks

 

[fhturner]

Re: auto headlights

1-when i checked the codes all that showed were history none were current what showed were Bo-RFA c-2110,U1064,U1016,
A1-RDMCB-2252,A0-LDCM-2252 all were history

Yeah, I don't think those are gonna be part of your problem. Looks like some issues in the past related to the Remote Function Actuators (key fobs) and the Door Control Modules.

2-yes the DRL are on when it's ligth

3-yes thay do turn to just parking lights when it's dark

Hmmm. If 2 is YES, then 3 is YES, step #4 is next, but it involves a scan tool. You're supposed to hook the scan tool up and go to BCM special functions. Then, "command the Automatic Lamp Control Headlamp relay On and Off" to see if the relay shows the correct position.

I don't have a scan tool, so I'm not really sure about this step. I believe the actual GM Tech2 scan tools are several thousand $$$. I think you can purchase lesser scan tools for a few hundred $$$, but I'm not sure what you lose when you go this route. If anybody else has any thoughts here, esp. about the scan tools, please chime in.

Fred

 

[johns07051]

well i just came from the dealer and made an appointment to have them check it out, i'll keep you posted.
and thanks to all for your input and suggestions
john

 

[johns07051]

well the headlights are fixed,but not with return trips to the dealer to refix what thay said was working just fine when i picked the car up,the problem i was told was the BCM and i would not have any more problems.so on the way home i covered the light sensor to see if the lights would come on automaticley but to my disappointment nothing happned i turned around and back i went to the dealer who swor that it was checked a hundred times and it worked every time,but could not make it work with me there thay said i would have to leave the car another day so thay could figure it out.so three days latter the dar seems fixed and when i asked what else thay did i was told the BCM had to be reprgramed,i hope thay have it fixed ,its a pain to have the car at the dealer.
john