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2003 Ford Crown Victoria: old one..battery light started illuminating…

Customer Question
I have a 2003 Ford...
I have a 2003 Ford Crown Victoria. I replaced the battery last year (old one lost a cell). This week, the battery light started illuminating seemingly at random, then goes off. It seems to happen more when the engine is at idle (ie. at a red light). What should I check?
Submitted: 8 years ago.Category: Ford
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Answered in 5 minutes by:
6/21/2010
Ford Mechanic: Richard, ASE Certified Technician replied 8 years ago
Richard
Richard, ASE Certified Technician
Category: Ford
Satisfied Customers: 15,800
Experience: 12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
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Hello and welcome to justanswer.com

 

Sounds like you have a problem with the alternator. You can have the battery and alternator tested at your local autozone or pepboys as they will do this at no charge. You can also test the alternator output at the battery with a voltmeter. Place the leads of the meter on each battery terminal. At idle with all accessories off it should read about 14-14.5 volts.

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Customer reply replied 8 years ago
OK. Should I check from Alternator to Ground as well?
Ford Mechanic: Richard, ASE Certified Technician replied 8 years ago
Yes if the charging system output is low then check from that cable on the alternator to ground just to make sure we do not have a voltage drop through the cable.

Edited by Richard on 6/21/2010 at 8:26 PM EST
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