Question about Ford E-250

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Battery light stays on all the time on my 1985 E250 ford van, i changed the alternator, changed the voltage regulator changed starter silonoid, and it does not hold a charge after jumping!

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  • Anonymous Mar 28, 2014

    voltage is 18dc

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U need to chek for batt volts at the pos pole on the bak of alt.should b batt voltage if not then wire from pos pole on back of alternator to battery could be broken,causing no output tobattery. wiggl voltage regulator wires while engine runs an check volts with a voltmeter to see if it jumps to over 13v wen wiggling connector.also chek fuses an fusible links for continuity.

Posted on Apr 08, 2011

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Posted on Jan 02, 2017

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If the headlights are dim when the engine stops, the alternator is not charging the battery.

A lead-acid battery will "recover" slightly when the engine is turned off. The recovery may be enough to allow the engine to be started again but if the battery is not being charged adeqautekly, the engne wills top running when the battery voltage falls too much. It won't last long, though. The battery terminal voltage should be around 14.5 Volts with the engine running. If it is 12V or less then the alternator is defective.

There are diodes in alternators to convert AC into DC for the battery. If you "jump start" cars with yours, its alternator diodes or the alternator's internal regulator circuit can be damaged due to excessive loads and/or what is called "inductive kickback" from the other car's starter.

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