Date: Thu, 21 Aug 2003 07:42:33 +0100
From: "Adrian England" <>
Subject: Re: Battery question -- 1995 9000CS

LauraK wrote: > On the Info display on the dash, I can get a readout for voltage, > mpg, miles left in tank, etc. > What does the voltage read? Current going from alternator to battery > or voltage coming out of battery? > Mine has been reading 13.3-13.7 when I'm driving. But today it dipped > down to > 12.3-12.5 and it's on 9.5 or even 8.x when I start the car. Been > starting fine, but takes a bit longer to start the first time I start > it each day. > I stopped at Advance Auto Parts and had them check the battery. They > said it's holding a charge fine. > Is my alternator going? Is it something else I need to be concerned > about? > Car is due for it's 85,000 mile check in the next few days. Should I > have them look at anything particular? > Thanks. > > > > web design, print design, photography When starting your car the trip computer displays minimum cranking voltage. This shows what condition your battery is in. When driving it shows system voltage which shows what condition the alternator is in. The readings you have given us indicate that your alternator is just fine. However the battery is struggling a bit. I have a large ( Ford Transit Van ) battery fitted to my '92 2.3 9k and in warm weather the cranking voltage rarely dips below 10.0 volts. In our english winters ( down to -10 degrees C ) it dips to low 9 volt readings. A smaller battery will give lower readings. If the cranking voltage continues to drop over a period of time, replace your battery before it dies. -- take off "ospam" to mail me

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