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Dimming headlights when in environmental auto mode

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Old Feb 22, 2002 | 03:52 PM
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From: tuttle ok
Default Dimming headlights when in environmental auto mode

I have noticed while driving at night usually with the heat and air in auto mode that the headlights will dim for just a second and then go back to normal. This happens ever so often. Could the a/c compressor kicking in cause this and has anyone else say this problem and is there a fix? This is on our 00 vert.
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Old Feb 22, 2002 | 04:07 PM
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Default Re: Dimming headlights when in environmental auto mode (jetmech)

I've noticed it, but only at idle. I assume I've got an alternator going south.
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Old Feb 22, 2002 | 04:39 PM
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From: tuttle ok
Default Re: Dimming headlights when in environmental auto mode (ThumbsUp)

I will try to notice rpm but I have noticed this glitch just driving down the road
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Old Feb 22, 2002 | 04:55 PM
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Default Re: Dimming headlights when in environmental auto mode (jetmech)

I have experience this as well, ever since I've owned the car. It seems as though from time to time there just isn't enough juice. I haven't worried about it, but it does bother me. I'll be interested to see other posts on the subject. :yesnod:
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Old Feb 22, 2002 | 07:00 PM
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Default Re: Dimming headlights when in environmental auto mode (kraff)

This happens to me also and I've been running with the Alt. gauge up on the DIC. There doesn't seem to be a correlation with the dimming and a drop in volts.
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Old Feb 22, 2002 | 07:02 PM
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Default Re: Dimming headlights when in environmental auto mode (kraff)

happens to me as well--if I'm rolling the windows up or down or turning the air on or off, adjusting the seat and such. never had a problem with the battery running down on me though.
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Old Feb 22, 2002 | 08:06 PM
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Default Re: Dimming headlights when in environmental auto mode (jetmech)

Happened with me also - I think the alternator may be a little undercapacity for our bells and whistles. I switched to the Optima Yellow because of its reserve deep cycle capacity and the dimming issue is a little bit better - definitely not as annoying.

JohnS
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Old Feb 24, 2002 | 12:01 AM
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From: tuttle ok
Default Re: Dimming headlights when in environmental auto mode (jetmech)

Nice to know other people are seeing this. Has anyone talked to a dealer about the problem? Does GM still have a Corvette hotline? The dealers here in my area seem to be a bunch of bumbling, stumbling, non-caring individuals.
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Old Feb 24, 2002 | 12:13 AM
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Default Re: Dimming headlights when in environmental auto mode (jetmech)

At my house when the AC goes on the lights dim for just a split second. A power drain is a power drain, no matter how you look at it.

Your condition is normal... only so many electrons can flow through wiring. ;)

vetterdstr :cheers:
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