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Old 09-27-2014, 11:37 AM   #1
chipsteph12
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Question Headlight/Battery Flicker

Hello,
I have a 2002 Saturn SL, 109,000 miles 5 speed. About two weeks ago I started having a problem. My headlights and dashlights flicker when I get above 2200 or 2300 rpms. Also, the battery light has started coming on at the same time. If you drop to 2000 rpms or below, no problems (battery light goes off, headlights stay on). I've had the battery and alternator checked twice, no problem. Any ideas where I should look next would be greatly appreciated.
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Old 09-27-2014, 12:04 PM   #2
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1995 SL1
Default Re: Headlight/Battery Flicker

Unless you have a slipping belt, bets are still on the battery or alternator. I'd check with a meter and alter the rev range to see what voltages show. It's possible you have a connection or ground that is intermittent and only showing up at certain rev ranges, but IMO that isn't likely if it consistently relates to RPM.

Battery cables and connections can look good and have issues as well. But for charge to drop as revs rise isn't very common.
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Old 09-27-2014, 01:28 PM   #3
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2005 VUE 2.2L
Default Re: Headlight/Battery Flicker

or maybe V regulator is going/bad diodes and V is spiking?
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Old 10-14-2014, 05:01 AM   #4
RichardM
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1998 SL1
Default Re: Headlight/Battery Flicker

Did you figure out what it is??? I was having a problem last year and decided to re[lace a seven year old battery. Six months later noticing problems coming back... I am going to try replacing the alternator next
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