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90 F150 problems
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<blockquote data-quote="TerryP" data-source="post: 4332731" data-attributes="member: 1564"><p>Alternators tend to sing some when under a heavy charging load like occurs when a battery is very low on charge or losing cells.</p><p>Check the alternator voltage output across the battery and make sure your in the 13.5-14.5 volt range with the engine running and also disconnect the battery terminals with the engine running and see if it continues to run. If it continues to run get your battery tested.</p></blockquote><p></p>
[QUOTE="TerryP, post: 4332731, member: 1564"] Alternators tend to sing some when under a heavy charging load like occurs when a battery is very low on charge or losing cells. Check the alternator voltage output across the battery and make sure your in the 13.5-14.5 volt range with the engine running and also disconnect the battery terminals with the engine running and see if it continues to run. If it continues to run get your battery tested. [/QUOTE]
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