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Old 11-26-2011, 04:29 PM   #1
BeeFzX3
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Question Motorcraft battery->red indicator->battery is dying?

A year ago I replaced my battery with the motorcraft one. Few days ago, after it was sitting for about 2 days, I try to start it and it cranks really slowly. I thought it might not even start, but after like 20 turns it finally starts. So I check the battery and the indicator is red.

I drove it for about 20min and then later for 1hr, indicator stays red. It sat for 3 days and started just fine.
Then I went to the dealer so they can check it, they checked it and told me that it's fine.
What does that red indicator really mean? It's staying red.
Is the battery dying?
If it's bad I want to make ford replace it under warranty. Dealership told me even if the indicator is red, they won't replace the battery because when they tested it, it showed 590 cranking amps. Well duh I just drove the car there for 20min so the battery got charged.
Could something else be malfunctioning? When the car is running my volt gauge shows 14volts, so alternator is working.
If it's not the battery I don't know what could have caused it to crank slowly...
Any input/ideas would be greatly appreciated
Thanks!


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Old 11-26-2011, 04:45 PM   #2
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FWIW, from Ford diagnostic manual: "No battery with a red test-eye should be replaced. The red eye only means the battery is discharged, not necessarily defective."
They then go on to say to use a proper digital battery analyzer meter to get true readings.
Try removing, cleaning and re-securing battery clamps as a first step.
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Old 11-27-2011, 03:47 PM   #3
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Depending on your driving, it may take quite some time to turn back green.

A good deep charge with a trickle charger should turn it back green within 24 hours.
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Old 11-27-2011, 05:18 PM   #4
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After you tighten the battery clamps and I am sure you tightened the 10mm nut as much as you can... see if you cannot wiggle the battery clamps sideways.

I just seen too much of that lately...
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Old 11-27-2011, 05:23 PM   #5
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Charge it with a battery charger. Then have the battery and the charging system load checked. And it should still be under a warranty.
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