Question about 1998 Saab 900

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Alternator problem alternator putting out 13.2 volts new battery. a mechanic said it needs 13.8 volts just to run the computer system. Wont't start unless i put a charge on battery

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Comp systems will run on 10 volts, so I don't think that's the problem. I'd check all cables and connectors pertaining to positive and ground and go from there....accordianman

Posted on Jul 22, 2008

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2 Answers

Why does my car not have any power after i boost it and drive it?


Bad battery and/or alternator. Once it is running, test voltage coming from alternator with a multimeter. Should be over 13 volts. If not, alternator may be bad. If alternator is sending over 13 volts, battery may be bad. Possible bad connection between alternator and battery, but not as common.

Aug 17, 2014 | 1994 Mercury Topaz

1 Answer

71 c10 not staying charged... new battery alternator fuses good and new voltage regulator


Maybe it wasn't running long enough to charge up the battery?
Stop trying to jump it, when you are having problems with it dying, take the battery off and have it charged. And/or buy a $20 voltmeter to see what the battery shows. If it says less than 12 volts, it is discharged, and needs charging. A good battery that is not run down should have at least 12.5 volts. A new battery that is charged should have very close to 13 volts, maybe 12.8 volts.
When you have the truck running, check the alternator for charging. You put the voltmeter right on the battery and check it again. This time, with truck running, battery should show at least 13.5 volts. That shows the alternator is working. A good alternator will put out about 13 or 14 volts-the regulator will keep it from going any higher to prevent problems, like a melting battery or electrical parts burning out.
I would say get the charging system working right, then address the problem of dying at stop lights. That could be a carburetor problem, if the alternator is working.

Aug 15, 2013 | Chevrolet Cars & Trucks

1 Answer

05 Chrysler Pacifica engine bucking , engine light comes on, battery light comes on. But battery is fully charged and alternator is working. When the battery comes out, it seems like the computer re


The Battery CCA Rating is to turn over the starter

CCA--Cold Cranking Amps
That is at zero degrees
Total cranking amps is at 32 degrees

The car runs off the alternator
It puts out over 14 volts

The 12 volt battery is 6 cells @1.2 v each = 13.2 v

You need 12.6 volts to test a car or you charge it first

You need over 13 volts to charge a battery,thus the alternator

The only other job the battery has is a stabilizer in the electrical
circuit

So you need to have the charging system diagnosed as the
various light you have on should be off when engine first starts

Dec 13, 2012 | 2005 Chrysler Pacifica

1 Answer

Starts with a jump but cuts off soon as cables are disconnected


Check your batteries voltage you need at least 12 volts.If you don't have 12 volts then put the battery on a 2-4 amp charge for 6-8 hours.Then if the battery does'nt have 12 volts get a new battery.If your battery has 12 volts afterwards and still cuts off then your alternator is faulty.With the engine running your alternators power wire should show 13-15 volts coming out.

Feb 03, 2012 | 2004 GMC Sonoma

1 Answer

I have a2001 Saturn SL and the battery light came on,Ireplaced the battery and had the Alternater checked but the battery light stays on. Advance Auto Parts said the alternater is not chargeing


Battery light usually means the alternator is not charging, get yourself a multimeter, select Volts, put red probe on positive and black probe on negative while the car is running, it should read above 13 Volts, not higher than high 14s, if it reads 12 volts or lower while engine is running than your charging system, alternator mainly, needs attention, any decent mechanic can check this in 2 minutes.

Jun 16, 2011 | Saturn LS Cars & Trucks

2 Answers

My car battery light came on then finally went dead after flashing for a while now wont start


Two things, 1- check and make sure the drive belt did not come off. 2- need to do an elec. check, if belt is ok, then more then likely the alternator has gone bad, if you can jump start your engine, check voltage at battery with engine running and jumper cable's remove, with volt meter check voltage at battery, that will be alternator out out voltage, should not have less then 13 volt's, if less, bad alternator, replace it.

Sep 09, 2010 | 2004 Ford Explorer

2 Answers

I HAVE A 1995 CADILLAC ELDORADO AND NEW BATTERY WONT CHARGE


altenators have to be running a 13.5 volt charge to be good

Mar 12, 2010 | Cadillac Eldorado Cars & Trucks

3 Answers

My 1998 isuzu will get jump started but wont hold the charge i thought after it runs for a couple of mins it should recharge it self wats wrong snl


If the battery is bad it will not hold a charge. Have your battery checked a the local parts house or your mechanic. Also have the charging and starting systems checked to insure they are working properly. Battery should have a reading of about 12.8 volts, alternator should be putting out between 13 and 14 volts. Starter should not draw to many amps.

Oct 16, 2009 | 1998 Isuzu Rodeo

1 Answer

Alternator charging problem


well if the alternator is not putting out at least 13 volts when it running most likly its bad i would take it some place and have it checked again

Jan 18, 2009 | 1994 Toyota Supra

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