Battery is good, but car won't stay charged

2005
0

Asked by 2005 Nov 17, 2012 at 08:49 AM about the 2005 Saab 9-3

Question type: General

Just bought the car, mechanic thought the key stayed in the car and drained the battery in transport. Battery is a "gold" battery and was charged drove all day, then after leaving it sit for 5 hours, it's dead. What could be going on?
Thank you,
Amy

5 Answers

DavidH25
Not Active

Simply having the key in it in "off" position will not drain battery You may have a drain for something such as an anti-theft device, all interiotior lights are off? Sometmes the switch gets bumped to 'on' . Have alternator checked also. Your car will drive a certian amount of time on battery, when the alternator goes bad but then it won't start. 5 hours of a, say, a dome/reading light should bit drain it that much

1 out of 1 people think this is helpful.
DavidH25
Not Active

Thinking on this, how do you know for a fact the battery is good? Fing a volt meter, and put it on the battery, should show 11......12 volts. Get it running and do the same, should show 12 to 14 volts. BUT voltage and apmerage are apples and oranges, voltage my be fime but it's not putting out proper smpd. i.e. cranking power. If a non deep cycle isl allowd t go 100% drained it can ruin it

1 out of 1 people think this is helpful.
DavidH25
Not Active

smpd is amps, I need to proof read before I post

tenspeed
51,695

Disconnect the battery by removing the negative wire when you're done using the car. Draining all the power from a battery will kill it over time. It might not hold a charge any more. Read how many volts are in the battery when you disconnect it. Read it again in a few hours to see if it is less. A good battery should read somewhere between 12 and 13 volts. You disconnect the negative side so if your wrench hits anything metal, it won't draw a arc. ---- If your battery is good, hook it back up and attach the volt meter to the battery. Remove the larger. maxi fuses one at a time. They feed power to regular sized fuses. Pull the fuse and see if the volts increase. If the volts stay the same, replace the fuse and pull another one. If you see the volts rise a little when you pull the maxi fuse, you know that something in that circuit fed by that fuse is drawing the battery down.

5 out of 5 people think this is helpful.
TonytheWoodsman
955

If you have a 12 volt test light, with the ignition off, and everything else off, disconnect the negative battery clamp from the battery, place one end of the test light to the negative battery clamp and the other end to the battery post. If the tester light glows, something is drawing power from the battery.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

9-3
Looking for a Used 9-3 in your area?
CarGurus has 1,415 nationwide 9-3 listings starting at $1,550.
ZIP:

Search Saab 9-3 Questions

Saab 9-3 Experts

#1 Tom Demyan
Tom Demyan
Reputation 390
#2 T_S_T
T_S_T
Reputation 290
#3 Kieran Roberts
Kieran Roberts
Reputation 220
View All

Related Models For Sale

Used Saab 9-5"
25 Great Deals out of 524 listings starting at $1,200
Used Saab 9-3 SportCombi"
77 listings starting at $4,952
Used BMW 3 Series"
1,405 Great Deals out of 34,182 listings starting at $1,795
Used Volvo C70"
51 Great Deals out of 712 listings starting at $2,495
Used Audi A4"
335 Great Deals out of 9,280 listings starting at $1,800
Used Saab 9-7X"
10 Great Deals out of 202 listings starting at $3,488
Used Saab 9-2X"
42 listings starting at $2,995
Used Volkswagen Jetta"
1,045 Great Deals out of 40,519 listings starting at $1,595
Used Volvo S60"
151 Great Deals out of 7,533 listings starting at $1,500
Used Ford Mustang"
1,073 Great Deals out of 23,464 listings starting at $950
Used Mercedes-Benz C-Class"
932 Great Deals out of 20,056 listings starting at $2,495
Used Volvo S40"
50 Great Deals out of 1,246 listings starting at $2,499
Used Honda Accord"
1,444 Great Deals out of 66,644 listings starting at $995
Used Nissan Altima"
1,995 Great Deals out of 73,042 listings starting at $1,000

Used Cars For Sale

2011 Saab 9-3 For Sale
4 Great Deals out of 78 listings starting at $10,450
2010 Saab 9-3 For Sale
3 Great Deals out of 77 listings starting at $9,900
2009 Saab 9-3 For Sale
32 listings starting at $8,449
2008 Saab 9-3 For Sale
8 Great Deals out of 164 listings starting at $5,977
2007 Saab 9-3 For Sale
4 Great Deals out of 117 listings starting at $4,540