2012 Mustang starting and electrical issued
2/17/18, 01:33 PM
#1
2012 Mustang starting and electrical issued
Hello been having this issue going on a year. 2012 Mustang 5.0 will not start when temperatures drop below 40 degrees. Runs and starts all summer no issues lights dim when volume is turned up also . But now it being cold if it sits over night will not start ,as soon as I jump it fires right up took it to the dealership they told me bad battery changed battery brand new still same issue any thoughts would be great thank you
2/17/18, 02:49 PM
#2
Shelby GT350 Member
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If you can, stop by your local Autozone, etc., let them check your electrical system, and battery. It's free. Then you'll have a better idea of what may be going on. It sounds like you have a charging issue. Good luck.
Last edited by wanted33; 2/17/18 at 02:50 PM.
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m05fastbackGT (2/18/18)
2/17/18, 05:00 PM
#3
Already done just bought a new battery today and it lunched an auto zone battery that was less then 1 and a half years old I’m thinking it’s the alternator or the starter dealer just checked electrical system yesterday and all they told me was bad battery
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wanted33 (2/18/18)
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2/19/18, 04:11 AM
#6
legacy Tms Member MEMORIAL Rest In Peace 10/06/2021
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Have the charging system tested at another place. If it test good, then you have a parasitic draw. There is a youtube video on how to find a parasitic draw. I had to do this to my old F150, only had 20 or so fuses to check. Our Mustangs have a lot.....
. Good luck 
. Good luck
2/19/18, 10:53 AM
#7
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David, haven't I read somewhere the Shaker radios can cause a draw? Something to do with the CD system I think, but I'm not sure if that included the 2012's.
2/24/18, 05:34 AM
#8
legacy Tms Member MEMORIAL Rest In Peace 10/06/2021
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