some q's on some things to check because of a dead battery in the morning

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Jan 5, 2001 | 11:36 AM

formula90

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Senior Member

Joined: Jun 2000

Posts: 515

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From: Webster,Texas,USA

Car: 1990 Formula

Engine: 5.7 liter

Transmission: 700R4

some q's on some things to check because of a dead battery in the morning

i have a 2 day new alternater, 1 day old battery, and for some reason, i am dead in the morning. i did not leave any lights on or anything simple like that....
really, i need some advice on how to troubleshoot this problem..what do i check? other than the obvious..hell, go ahhead and include the obvious, just in case..thanks in advance

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Jan 5, 2001 | 11:50 AM

RB83L69

Supreme Member

Joined: Jul 1999

Posts: 18,457

Likes: 16

From: Loveland, OH, US

Car: 4

Engine: 6

Transmission: 5

Lights...

Underhood light, cargo area light, any others in places you don't always look at, brake lights stuck on...

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"So many Mustangs, so little time..."

Jan 5, 2001 | 12:24 PM

R.O.B.

Senior Member

Joined: Aug 1999

Posts: 611

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From: Glendale, AZ

Try removing the negative cable, and placing a Mulit-meter in between the connection. Look at the amp draw. There will always be a minor amount for the computer and your stero. Then start removing fuses, when you notice a big drop in draw, this is the circuit to start looking for problems.

I've had things like: alternater diodes bad, stereo amp failed, center console light left on.

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Rob
'86 TA 305 TPI