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AMP Meter Question

paul67

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Joined
Mar 2, 2003
Messages
1,113
Location
Ontario, Canada
Corvette
1974 convertible
I attended a very nice cruise event yesterday in Quebec, Canada. A very nice show! On the way home I noticed my AMP gauge was a wee bit shy on the (-) side rather than a wee bit shy on the (+) side as used to be the norm. I tested the output from the alternator tonight and it looks fine at 14.5V. But in the non-running condition the battery shows 13.5V. It seems over-charged. Any ideas what is happening here. It is an Optima 800CCA battery.

 

paul67

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Joined
Mar 2, 2003
Messages
1,113
Location
Ontario, Canada
Corvette
1974 convertible
Today the ammeter is perfectly normal: slightly (+). I can't explain what happened last Sunday.
 

Viet Nam Vett

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Joined
May 28, 2004
Messages
2,410
Location
Egg Harbor Township NJ
Corvette
65 BB 502 Cp /MSD ATOMIC EFI/ 2009-HUMMER H2
Today the ammeter is perfectly normal: slightly (+). I can't explain what happened last Sunday.


I'd check the connection at the meter...Of course..disconnect the negitive battery terminal before checking.:)
 
Joined
Aug 3, 2003
Messages
653
Location
N C / Illinois
Corvette
1985 Coupe /1977 L82 Coupe / 1971 Red Coupe
Thats normal for an Optima. Might have been something shorting out the guage and then fell off, check the guage for a loose conection or something that might be touching it and grounding it out somewhat.
 

paul67

Well-known member
Joined
Mar 2, 2003
Messages
1,113
Location
Ontario, Canada
Corvette
1974 convertible
I'll check the gauge connection. I have since learned that a fully charged (100%) gel battery will show 12.85 volts in a non-running state. So I guess things are normal.
 

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