Alternator is over charging

Asked by GuruL5T7G Mar 24, 2019 at 05:28 PM about the 2001 Ford F-150 XLT 4WD SB

Question type: General

Can anyone help me i have a 2001 f150 5.4
replaced the alternator twice and the battery and
the alternator connection's but it's still over
charging jumping from 12 to 14 volts all dash
lights and headlights are surging every time I have
it tested they say it's a bad alternator but when i
replace it and they test the old one off the truck it's
good

3 Answers
75

Pwdahmer answered 5 years ago

13.7 to 14.3 volts is a normal charge for an alternator. Have you had your battery tested? Usually you want to change the battery and alternator at the same time.

Mark helpful

GuruL5T7G answered 5 years ago

Im sorry that was a typo it was supposed to say it's jumping to 16 volts. Yes i replaced the battery also

Mark helpful

Your Answer:

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