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Old 05-08-2004, 02:34 AM   #1
1Low76jimmy
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Flickering Lights

Whats does it mean when I'm at a Stop/Idle my Headlights & Interior Lights Flicker in my 1985 Suburban. Do I need a Better/New Alternator???
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Old 05-09-2004, 11:00 AM   #2
NeCrOmAnCeR
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At idle, this may happen. Alternators (especilly high amperage ones) are not very efficient at low speeds. If the charging system works normally otherwise I would not be concerned. If it is too annoying, try a replacement. My voltage also drops at idle with lights, A/C, etc turned on.
The flicker is caused by the regulator trying to increase the alternator output.
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