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Battery failure ford diesel 350 -2003

Battery failure and new alternator runs down so something is darning the battery.,

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  • greg Nov 01, 2012

    sorry to ask but did you test the batterys

  • greg Nov 01, 2012

    a bad ground will kill it and if one batterys is good and the other bad that will discharge

  • greg Nov 01, 2012

    and make sure you test the batterys one at a time . if hooked together it will give you a fulse +



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I recently had the same complaint and after alot of trouble shooting I located my problem to be a wirring harnes conector on top of the engine for the injector pump moduel. The contacts looked real good however the theory is when they heat up they warp away from their mate and this activates the computor and keeps it from going into sleep mode thus draining the batteries. You could have any conector problem but I would look where the temperature changes the most. In my case I cut the conector out and soldered the wires together. My batteries seam much better now it has been 2.5 months which is a record for my batteries going dead.

Posted on Nov 02, 2012


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SOURCE: When accelerating alternator light comes on.

Possible loose or worn alternator belt. Check the condition of the belt. If it's worn, replace it. If it's just loose, tighten it up.

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SOURCE: 1996 ford f250 diesel truck alternator

has anyone thought about the regulator, i think that its built into the alt, replace it and then see if the prob continues, you can get a pass on the alt test and still have a bunk regulator

Posted on Mar 30, 2009

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SOURCE: Batteries not charging in 83 Ford 6.9L diesel.

What is the temperature gauge doing?
Does it get to about half way, or does it barely get off cold?
If it stays fairly cold, then it is probably the thermostat jammed open and needs replacing.
The glow rail controller senses engine temperature to turn off the glow rail (about 50C).
If the glow rail stays on + short trips + winter driving with lights, defrost, heater on, lower air temperature, then the alternator cannot keep up with the glow rail staying on.

Posted on Oct 26, 2009

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SOURCE: just fitted new alternator but battery light not working

mending bushes on ford fiesta courier van

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SOURCE: 2004 Dodge Ram 2500 diesel. The Check Gauges lite


Posted on Nov 04, 2010

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