7.3 Battery issues - Ford Powerstroke Diesel Forum
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Old 07-25-2011, 03:50 AM
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7.3 Battery issues

I got 2 new batteries bout 3 years ago and am having charging issues, not sure if it is just time to replace batteries or if I need to upgrade autozone alternater, or connections.
If i charge on buddies nice battery charger it does good for a week or 2, if I jump from diesel truck and let charge for a min it good for 3 days, if I charge with my little charger or jump with gas truck it last a day, then batts dead again
Thinking of changing out batts, alternater, and cables.
any suggestions on what batts, or higher output alternater, and a good source for connections (last time I got connections went to a big truck parts place and didnt really like what i got but only ones that would fit)
any help would be appricated

Dead In Driveway
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Old 07-25-2011, 07:16 AM
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I Never think "throwing parts" at a problem is the way to approach it

Something's wrong, find out what That is and fix it!

Putting new cables or ends on is a great start but, you can have the Alt & Batteries tested before you just replace them......

Take the batteries out and fully charge them up, then take them and have them, individually, Load Tested.

If they're good you could confirm the Alt was doing something with a simple volt meter. It too can be pulled & tested to be sure it's putting-out what it should for Amperage (not just Voltage)

Save yourself from spending money on new stuff you don't need
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Old 07-25-2011, 08:14 AM
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check alternator outpu

I had bad cable ends, and a 4 amp draw (alternator), and a GP relay that was drawing when off,

look here

4 amp draw

Battery cable fix

Last edited by ianstew; 07-25-2011 at 08:37 AM.
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Old 07-25-2011, 08:24 AM
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Quote:
Originally Posted by NoRalPh View Post
I Never think "throwing parts" at a problem is the way to approach it

Something's wrong, find out what That is and fix it!

Putting new cables or ends on is a great start but, you can have the Alt & Batteries tested before you just replace them......

Take the batteries out and fully charge them up, then take them and have them, individually, Load Tested.

If they're good you could confirm the Alt was doing something with a simple volt meter. It too can be pulled & tested to be sure it's putting-out what it should for Amperage (not just Voltage)

Save yourself from spending money on new stuff you don't need


Am I reading this right that you have an Autozone Alt? If thats the case, I bet it's not putting out enough to charge the batteries. Either way, like said, pull the alternator AND batteries and have them all tested.
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Old 07-25-2011, 01:30 PM
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test alt,test batterys,check and clean all terminals and connection,between all that you will find your problem.
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