starter engages for a second and quits. | Page 2 | Ford Explorer Forums - Serious Explorations

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starter engages for a second and quits.

Found it. Tests less than 9v
 



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On both sides? One side comes right from the battery and should have +12v.
 






OK got ya.
positive side shows same as battery +12v
other side shows less than 9v+-
 






You should have 12v all the way to the alt. Sounds like you may have some corrosion issues.
 






There is also a 30 amp mini fuse in the dist box(#14 I think) that supplies 12v to the regulator. Check that as well. Only having 9v at that mega fuse is not good. I don't think the alt will charge with less than 10v at the rectifier. There's got to be a bad connection or some corrosion either at a connection or in a cable.
 






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