99 mustang gt eating batterys

theoneandonlysid · January 26th, 2013, 01:57 PM

Ok so if any of you have not read my last thread of what I thought this was here is is:

weird voltage issue, could be starter or alternator

i thought my car was having alternator issues, but I installed a alternator I had as a spare that I know was good and the same thing happened. I drove the car home after hanging with a friend on thursday night. I go to start the car friday morning and its dead. After I get back home from work I grab my battery charger and put it on 200amp quick start thinkin the mustang would need just alittle bump but the starter just clicked. I decided to let the car sit for a few hours on 35 amp charge and when I went out to start the car again still just clicking from the starter.

The last time this was the same exact symptoms and when I installed a new battery everything was good. The last battery lasted for two weeks or so. I have a feeling something on the car is causing the battery's to get bad cells and making them useless.

I've looked around on here alot and saw that it could be the GEM module but idk, I've never dealt with a problem like this.

Anyone got any advice because this is driving me insane .

theoneandonlysid · January 28th, 2013, 12:39 AM

Well I still haven't figured anything out, the weather here has been crazy all weekend. It went from 9 degrees friday morning to 50 degrees this afternoon.

FinnFox · January 31st, 2013, 01:36 PM

Do you have amp meter, how much current car drains when sitting?

January 26th, 2013, 01:57 PM	#1
theoneandonlysid Newbie 99 mustang gt Join Date: Jan 2011 Location: harrodsburg, ky Posts: 36 iTrader: 1 reviews	99 mustang gt eating batterys Ok so if any of you have not read my last thread of what I thought this was here is is: weird voltage issue, could be starter or alternator i thought my car was having alternator issues, but I installed a alternator I had as a spare that I know was good and the same thing happened. I drove the car home after hanging with a friend on thursday night. I go to start the car friday morning and its dead. After I get back home from work I grab my battery charger and put it on 200amp quick start thinkin the mustang would need just alittle bump but the starter just clicked. I decided to let the car sit for a few hours on 35 amp charge and when I went out to start the car again still just clicking from the starter. The last time this was the same exact symptoms and when I installed a new battery everything was good. The last battery lasted for two weeks or so. I have a feeling something on the car is causing the battery's to get bad cells and making them useless. I've looked around on here alot and saw that it could be the GEM module but idk, I've never dealt with a problem like this. Anyone got any advice because this is driving me insane .

January 31st, 2013, 01:36 PM	#3
FinnFox Newbie 1994 Mustang Cobra 14.985 Join Date: Apr 2008 Location: Finland Posts: 29 iTrader: 0 reviews	Do you have amp meter, how much current car drains when sitting? __________________ Ford Mustang Cobra 1994(Flowmaster long tubes+exhaust, Lunati 51014, K&N cai, 3.73, T5, ported heads, QH+BE+EA J4J1), Ford Thunderbird SC 1994(Ported M90,large top,3"pipes and exhaust, dirtydog 4R70W)

January 28th, 2013, 12:39 AM	#2
theoneandonlysid Newbie 99 mustang gt Join Date: Jan 2011 Location: harrodsburg, ky Posts: 36 iTrader: 1 reviews	Well I still haven't figured anything out, the weather here has been crazy all weekend. It went from 9 degrees friday morning to 50 degrees this afternoon.

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