RE: [DML] Battery condition

["John Hervey" <john@xxxxxxxxxxxxxxxx>]

 Nathan,
A battery should be reading across the terminals at 12.66 volts or maybe a
little higher at any time. 
The alternator should be reading 13.8 to about 14.6 at the engine battery
terminal or again across the terminals at a fast Idle. 
9.5 vol6ts is ok for starting but the voltage needs to be higher for
running. If you measure the battery at any time and it reads across the
terminals 12 volts, then it's about 20% capacity. 
I would say the battery either won't hold a charge if you charged it and
needs to be replaced. 
John Hervey
www.specialtauto.com

 

-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of
valleyrat12
Sent: Monday, January 30, 2006 10:02 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Battery condition

I have recently been questioning the condition of my battery for 
these reasons:

1) I checked the voltage at blue/yellow wire on the big resistor and 
it reads 9.5 volts. If I rev the motor so that the alternator 
engages the voltage will jump to 11.5




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