Mechanics

HEADLIGHTS DIMMING AT IDLE

2007 Chrysler PT Cruiser • 4 cylinder FWD Automatic • 25,000 miles

Enter your question. Headlights dim when I turn on the heater fan at idle. Also, they seem to dim a little at a stop. Just noticed it tonight. Could that be a battery problem, an alternator problem or something else. This is a 2007 PT Cruiser with only 25,000 miles.
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Fancyflyer
December 17, 2010.




First check the alternator charge rate, have the battery load tested and check that all battery terminals are making a clean and tight contact to the posts, start here.

Mark (mhpautos)
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Mhpautos
Dec 17, 2010.
I wouldn't be real surprised if you find no problem. It's not terribly unusual to see symptoms like that at idle. Sometimes the RPMs just aren't sufficient to keep up with the load.

Wrenchtech
Dec 17, 2010.

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