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alternator or battery?

490 Views 8 Replies 7 Participants Last post by  Blazin72
I won't to turn my 2011 mustang with 22,000 miles on today and it didn't start up , all I heard was this tick tick noise and the dash lights flashing but the car wouldn't turn on . I called a tow truck they gaved the car a batry boister and it started , I then didn't move the car but tonight when I went to start it again it didn't turn on and it did that tick tick noise again but it woulwould nit start . The radio and light work but the car won't star , any suggestions?
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Youll have to try to fully charge the battery and if it takes a full charge,load test the battery to determine if it is good.If it chargesup fully,then test the alternator for its output.After you jump started the car,how long did you leave it running?
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Youll have to try to fully charge the battery and if it takes a full charge,load test the battery to determine if it is good.If it chargesup fully,then test the alternator for its output.After you jump started the car,how long did you leave it running?
plus1..gif Once jumped the alternator fully charges the battery in about 2 1/2-3 hours at high rpm (2500-3000). If you jumped it and drove home and let it sit for about 8 hours then it is dead again and you have to jump it again or invest in a battery tender if your car sits for long periods of time. If you drove it 3 hours and it still dies its either the battery or alternator like hockeyman said. If its a newer model check the battery and if older vise versa.
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Take the battery to a local parts store...Autozone, etc. They will charge and test the battery for free. Go from there...
For a 2011, I'll bet you a coke that you'll need a new battery. Once you suck the voltage down to nothing like that on a four year old+ battery, and especially twice, it probably won't recover.
+1 to all the above. I would check connections/cables too. A bad connection will give the same symptoms. Is it a daily driver? Nice day toys are more likely to have bad batterys.
It's all good I changed the battery and the car is working just fine.
It's all good I changed the battery and the car is working just fine.
Get that gasoline smell you mentioned on another post looked into though. That could be serious.
Get that gasoline smell you mentioned on another post looked into though. That could be serious.
I wonder if somebody damaged a fuel rail/line or something while changing the battery?
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