Headlights dim slightly with window roll up

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Oct 19, 2005 | 01:59 AM

dataporter

Thread Starter

Burning Brakes

Joined: Oct 2005

Posts: 924

Likes: 161

From: Atwater CA

2024 C7 of the Year Finalist - Unmodified

Headlights dim slightly with window roll up

On my 99 frc the Headlights dim slightly, but noticably, for a split second when the I roll the windows up. It happens from when the window is fully closed until I lift my finger off the switch. Is this normal? I have a new Optima battery and have no other electrical problems whatsoever.
thanks
Dave

Oct 19, 2005 | 02:02 AM

terlox

Racer

Joined: Aug 2005

Posts: 307

Likes: 0

From: Bay Area CA

I believe this is normal. My interior instrument lights dim ever so slightly when I turn on my fog lights.

Oct 19, 2005 | 02:04 AM

ericdwong

Race Director

Joined: Dec 2002

Posts: 10,233

Likes: 21

From: Baltimore suburbs Maryland

Normal. It takes a tremendous amount of power to move an electric motor.

Oct 19, 2005 | 08:44 AM

striper

Le Mans Master

Joined: May 2005

Posts: 6,366

Likes: 249

From: Fort Lauderdale, Florida

This is probably normal on most cars, not just Vettes. That moment when the window stops and the button is still held puts a lot of load on the entire system.

Oct 19, 2005 | 09:21 AM

WKMCD

Race Director

Joined: Dec 2004

Posts: 13,760

Likes: 75

From: Haymarket VA

Normal

Oct 19, 2005 | 10:42 AM

kasper-pA-

Burning Brakes

Joined: Jan 2003

Posts: 881

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From: Houston TX

St. Jude Donor '05, '14, '15

Mines does this as well, but I thought i read somewhere that when you swap out battery with a Red Top it doesn't do it anymore? anyone know if that's true?

kasp

Oct 19, 2005 | 10:52 AM

5.0_CJ

Drifting

Joined: Jan 2005

Posts: 1,342

Likes: 3

From: Arlington TX

It's a GM

at least its not like my mustang, if you held all 4 window buttons up, hit the brakes, had to headlights on, and moved the power window mirror, you would kill the car.

Oct 19, 2005 | 10:55 AM

Grumpy

MONARTOR

Joined: Aug 2001

Posts: 250,144

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From: What I know, is dwarfed by what I pretend to know

Cruise-In 5-6-7-8 Veteran

St. Jude Donor '03 thru '26

NCM Sinkhole Donor

Quote:

Originally Posted by kasper-pA-

Mines does this as well, but I thought i read somewhere that when you swap out battery with a Red Top it doesn't do it anymore? anyone know if that's true?

kasp

not really.. does it less..mine dims every day, while lights are on, approximately 5 minutes after I leave home, almost in the same spot. Can set yoyur watch to it..only does it one time.. used to do it a lot with the GM battery( turn signals, windows etc..)

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Oct 19, 2005 | 10:56 AM

SGT. PYLE

Burning Brakes

Joined: Apr 2005

Posts: 753

Likes: 1

From: Oceanside CA

Quote:

Originally Posted by kasper-pA-

Mines does this as well, but I thought i read somewhere that when you swap out battery with a Red Top it doesn't do it anymore? anyone know if that's true?

kasp

Not true. I heard this and went out and bought a Red Top. Lights still dim when you hit the windows.