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Discussion Starter #1
So tonight I was driving home, I decided to roll down some windows as it was kinda stuffy. I noticed the headlights dimmed whenever I used the power windows. Now I realize that the Fiesta is running quite a bit of electrical devices, headlamps, tail lamps, instrument panel, ambient lighting, and LED lighting (irrelevant since LEDs suck up little to nothing). Thinking of a way to improve electrical flow, maybe a grounding kit would help a bit, or even an oversized battery. Ideas?
 

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So tonight I was driving home, I decided to roll down some windows as it was kinda stuffy. I noticed the headlights dimmed whenever I used the power windows. Now I realize that the Fiesta is running quite a bit of electrical devices, headlamps, tail lamps, instrument panel, ambient lighting, and LED lighting (irrelevant since LEDs suck up little to nothing). Thinking of a way to improve electrical flow, maybe a grounding kit would help a bit, or even an oversized battery. Ideas?
I don't think the lights dimming is a problem. My Mazda does the exact same thing.
 

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I don't think the lights dimming is a problem. My Mazda does the exact same thing.
My 2004 Ranger doesn't dim. I'm going to have to pay more attention to the the Fiesta tonight.
 

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Most cars and trucks dim when you roll up or down windows. Try rolling up multiple windows. Most cars go slower when there are multiples moving. Its just a drain on the system. This is normal.

Every car I have owned has done this, and in my shop.
 

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Discussion Starter #5
Most cars and trucks dim when you roll up or down windows. Try rolling up multiple windows. Most cars go slower when there are multiples moving. Its just a drain on the system. This is normal.

Every car I have owned has done this, and in my shop.

Doesn't happen in my IS. Then again I'm comparing an overpriced Toyota to a subcompact. I'll deal with it I guess.
 

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I started to watch my Scangage voltmeter today while driving.
Normal driving = 14.1 V.
Driving with the a/c and hi-fan = 13.7 V.
Lowering a window = drops about .1 V.
Holding down a window power button when the window is already up = 13.1 V.

So, raising or lowering the window shouldn't be having a noticeable effect until you reach the end of the window's travel, and the motor then stalls out. If you're seeing an effect otherwise, do some testing with a voltmeter to verify your impressions.
 
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