Battery Issues
Thread Starter
Instructor
Joined: Oct 2006
Posts: 141
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From: Chandler az
Battery Issues
Lately when I start the car all my gauges seem to reset on the HUD and on the DIC. My MPG resets, along with other bits of info.
Could my battery be going out? I checked the battery voltage when I'm driving and it reads approx 14-14.2
Could my battery be going out? I checked the battery voltage when I'm driving and it reads approx 14-14.2
Burning Brakes
Joined: Oct 1999
Posts: 836
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From: Colorado Springs, Colo., USA
Load test good idea, but short term, just turn the ignition to the ON position (not the Acccessories position) but don't start the car. Give the gauge a little time to read accurately and what shows is the level of volts your battery stands at. If less than about 10.5 volts on the gauge, a load test may tell you a new battery is in order.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
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From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I'd say its almost certain the battery is on its last legs. Classic symptoms
Remember the DIC voltage is only accurate when the car is running. Check with a multi meter across the terminals
Remember the DIC voltage is only accurate when the car is running. Check with a multi meter across the terminals
Burning Brakes
Joined: Oct 1999
Posts: 836
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From: Colorado Springs, Colo., USA
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Been there, when cranking voltage falls below about 8.5 volts, it erases these memories. You can try charging the battery. I load tested mine, my 800 CCA tested at 250 CCA and was bad.
I only use AGM batteries in my C5, since the computer is under the battery. Optima, Sears Platinum, Excide are AGM, be prpared to spend over $150.
I only use AGM batteries in my C5, since the computer is under the battery. Optima, Sears Platinum, Excide are AGM, be prpared to spend over $150.
Race Director
Joined: Nov 2003
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From: Mustang OK
CAR AND DEEP CYCLE BATTERY FAQ 7.1
HTH
Last edited by GrayC5; Jan 3, 2008 at 12:44 AM.
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From: Spring Texas
St. Jude Donor '08
You need Handheld voltmeter from an autoparts store or even a wal mart. Measure the voltage across the battery. It should be between 11.5-12.5 volts. Anything below 11.5 is suspect and below 11 means you need a new battery now.
....or you could get your local auto parts store to check it for you.
....or you could get your local auto parts store to check it for you.
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I'd have to say it sure sounds like a battery going bad. Might want to get it checked soon.
Race Director
Joined: Jun 2005
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From: Lenoir City TN
St. Jude Donor '08-'09-'10-'11
and most places will check it for free.
Pro
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From: Bainbridge Island Wa
Burning Brakes
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