C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

daytime running light

Old Mar 16, 2002 | 07:11 PM
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Default daytime running light

Hey guys, I just got my first vette, it's a 1994 polo green 6-speed that i bought from another forum member. The car was originally a canadian car, so it has the daytime running lights. Does anyone know if there is an easy way to keep them from turning on everytime i drive through the shade? If the light is right they seem like they are constantly turning on and off. I would like to either be able to control them myself all the time, or better yet be able to turn on and off the automatic part of the lights.

Thanks a lot

Doug
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Old Mar 16, 2002 | 07:14 PM
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Hello and welcome! :) This issue comes up every few months, so hopefully somebody will have the answer for you.
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Old Mar 17, 2002 | 05:26 PM
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Default Re: (scorp508)

Thanks Scorp, so does anyone have a solution for this? I tried searching the archives and couldn't find anything...
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Old Mar 17, 2002 | 09:07 PM
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Default Re: (konroh)

The photocell sensor is located on the dashboard above the speedo. The sensor is round and the inner part will lift up slightly to expose the wiring. If you short these wires the sensor will ground the signal to the ecm.
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Old Mar 17, 2002 | 10:20 PM
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Default Re: (383LPE)

I tried shorting the photo cell on my 94, and it only made the lights stay on all of the time. The photo cell generates a micro voltage, no voltage = lights on, generated voltage = lights off. So far, no one has come up with a solution. I have considered calling GM to see if there is some way to bypass the sensor, but I sold the 94 to my son, and I'm building an 85 tire shredder.
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Old Mar 21, 2002 | 08:35 PM
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Default Re: daytime running light (konroh)

From what I could recall this issue came up about 2-3 yrs ago and it was suggested to place a 100ohm resistor in parallel to the photosensor.
(leave the photosensor in place and put a 100 ohm resistor in parallel)
Hope this helps.
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Old Mar 21, 2002 | 08:49 PM
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Default Re: daytime running light (FrankD)

Thanks...I'll give that a try and post the results here as soon as i get a chance.
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Old Mar 22, 2002 | 11:46 PM
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Default Re: daytime running light (konroh)

Thanks for all the help, i tried the resistor trick and it worked like a charm :)
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Old Mar 24, 2002 | 04:27 AM
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Default Re: daytime running light (konroh)

Glad to know my memory serves me well after all these years.
Tell me ,how did you test if it works or not.
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Old Mar 24, 2002 | 06:49 PM
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Default Re: daytime running light (FrankD)

In my garage it would usually turn on the headlights as soon as i let off the parking brake...after the change the lights stayed off...also, i drove it last night and i had complete control over when the lights came on...

Thanks for the tip...
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Old Mar 25, 2002 | 01:54 PM
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Default Re: daytime running light (konroh)

Glad to see that we finally solved this ongoing issue.
I suggest that this should be put in the TECH TIP section, since this has been an old dilemma which we finally solved.
This would be of great help for other members that that would like to modify the Daytime Running Lights.

what do you think?
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Old Mar 26, 2002 | 02:28 PM
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Default Re: daytime running light (FrankD)

Thanks for the tip FrankD.

I just did it on my '90 and it works fine. :cheers:
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Old Mar 26, 2002 | 04:40 PM
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Default Re: daytime running light (Sliding)

I don't know if anyone already submitted this modification to the tech tip area, but i just did. I also mentioned in the tip that the credit really belongs to FrankD for figuring out how (or at least remembering how) to do this mod.
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