battery

Stang187 · January 30th, 2010, 09:07 AM

my battery keeps dying and i took my car to auto store and both alternator and battery checked out to be fine, though battery needs to be charged. So they charge it and give it back, about a week later my battery dies again. I've made sure nothing is left on like a light or charger plugged in etc.

what would cause this?

C MY 4D · January 30th, 2010, 09:08 AM

Did they load test the alternator? How many amps was it producing? Do you have a parasitic draw?

Matt. · January 30th, 2010, 10:31 AM

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joe_shizzle · February 8th, 2010, 02:20 AM

if you have a digital volt miter, you can check the amps drawing off the battery, simply disconnect the negative cable, and put one lead on the cable, and the other on the post, if anything really over 3 amps, then you start pulling fuses to see which circuit is the problem, then you can go from there to solve the problem, it happend to me with my cd player. thats why i know lol

sikedsyko · February 8th, 2010, 02:37 AM

Check for corrosion on your battery terminals? If not check to see if something on your car isn't staying on when even after you turn the car off.

longalan2 · February 8th, 2010, 06:05 AM

my 07 v6 did that also. it turned out that the battery was not making good connection . at first i thought that it was the udp doing it, but it was the terminals.

clidefr0g · February 8th, 2010, 08:40 AM

Make sure you don't have a dime stuck in your lighter socket.

Codeman · February 8th, 2010, 11:50 AM

All of the above are good suggestions. I would recommend cleaning the posts like they said above, along with cleaning the clamps. Then you can check the amp draw, and see if you have a parasitic draw like above said

January 30th, 2010, 09:07 AM	#1
Stang187 Enthusiast 2004 Mustang GT Join Date: Jan 2007 Location: Florida Posts: 696 iTrader: 0 reviews	battery my battery keeps dying and i took my car to auto store and both alternator and battery checked out to be fine, though battery needs to be charged. So they charge it and give it back, about a week later my battery dies again. I've made sure nothing is left on like a light or charger plugged in etc. what would cause this?

January 30th, 2010, 09:08 AM	#2
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	Did they load test the alternator? How many amps was it producing? Do you have a parasitic draw? __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

February 8th, 2010, 02:37 AM	#5
sikedsyko \/ Hidden Bewbs \/ 01 Cobra Vert Join Date: May 2007 Location: Houston Posts: 5,732 iTrader: 0 reviews	Check for corrosion on your battery terminals? If not check to see if something on your car isn't staying on when even after you turn the car off. __________________ MM Cobra Club #66

February 8th, 2010, 11:50 AM	#8
Codeman Hardcore Enthusiast Join Date: Nov 2007 Location: North Dakota Posts: 2,933 iTrader: 1 reviews	All of the above are good suggestions. I would recommend cleaning the posts like they said above, along with cleaning the clamps. Then you can check the amp draw, and see if you have a parasitic draw like above said __________________ UDP, CAI, True Duals, LTs, 91 Tune from TT, 3.73 gears, Tlok,Windstar upper, GT TB, Ported lower, Comp 218/226 cam, FRPP C Springs, J&M LCA, Tokico Blue shocks and struts, and J&M Full Length Subframe Connectors

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February 8th, 2010, 02:20 AM	#4
joe_shizzle Regular 1999 3.8l v6 14.7 @ 100mph Join Date: Apr 2008 Location: Elign Il 60123 Posts: 56 iTrader: 0 reviews	if you have a digital volt miter, you can check the amps drawing off the battery, simply disconnect the negative cable, and put one lead on the cable, and the other on the post, if anything really over 3 amps, then you start pulling fuses to see which circuit is the problem, then you can go from there to solve the problem, it happend to me with my cd player. thats why i know lol

February 8th, 2010, 06:05 AM	#6
longalan2 Regular 2007 mustang v6 8.903 1/8 @74.96 Join Date: Nov 2008 Location: texas Posts: 160 iTrader: 0 reviews	my 07 v6 did that also. it turned out that the battery was not making good connection . at first i thought that it was the udp doing it, but it was the terminals.

February 8th, 2010, 08:40 AM	#7
clidefr0g Enthusiast 99 mustang Join Date: Feb 2010 Location: Vancouver Island Posts: 967 iTrader: 0 reviews	Make sure you don't have a dime stuck in your lighter socket.

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