Dead Batteries - Ford Powerstroke Diesel Forum
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Old 07-28-2013, 07:58 PM
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Unhappy Dead Batteries

I dont know how to test the voltage and
all that stuff i do have a voltage meter tho.
But my battery light was flickering about a
week ago and then was solid and the truck
would hesitate to start and then wouldnt
start a while after because the
batteries were dead.I brought the alternator
to bennette where i bought it it tested bad, they
gave me a new one nothing changed
brought it back it tested bad, they took one
out of the box to test before giving it to me
it tested bad to. So they gave me back the second one they
gave me to keep to come back and replace when they
ordered a new one so i went to nappa with it and it tested
good put it back in my truck so that i could drive it home once
i put the batteries on charge. So i charged the batteries and
they are both within a year old but im not driving my truck
because the alternator is not charging my batteries and
theyre just going to keep dying what could be the porblem.
By the way i was taking my pcm out to check the code
to order a chip and my dumbass tried to crank the truck before
plugging it back in could this have anything to do with it.
I plugged the pcm back in and its cranked and drove
fine up until the last week or so.

Last edited by 96psdmike; 07-28-2013 at 08:07 PM.
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Old 07-28-2013, 08:20 PM
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You could have bad batteries, or a bad voltage regulator plug and harness, not commanding the alternator to charge. Could have bad battery connections and/or cables and/or grounds.
Also, if you remove the PCM, ALWAYS disconnect the batteries, always.
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Old 07-28-2013, 08:31 PM
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Quote:
Originally Posted by jesilvas View Post

You could have bad batteries, or a bad voltage regulator plug and harness, not commanding the alternator to charge. Could have bad battery connections and/or cables and/or grounds.
Also, if you remove the PCM, ALWAYS disconnect the batteries, always.
And if you dont unplug the batteries what could happen?
And how do you check the Plug and Harness?
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