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Thread: If my alternators gives 12.5 above idle is it bad or it's normal? |
    
Silver Member Username: Panamanian
Panama city
Panama
Post Number: 142
Registered: Aug-05
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| Posted on Thursday, December 29, 2005 - 10:19 am: |
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say at 1500 ~ 2000 rpm my alternator indicates 12.5 is it normal? or something is damaged?
gracias |
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Silver Member Username: Theelfkeeper
Stockbridge,
GA
USA
Post Number: 760
Registered: Feb-05
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| Posted on Thursday, December 29, 2005 - 06:23 pm: |
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should be at 13.8 at idle and 14.4 above 1000 - 1500 RPMs. does it do that always or just when you have your stereo and stuff going?? |
Silver Member Username: Panamanian
Panama city
Panama
Post Number: 143
Registered: Aug-05
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| Posted on Thursday, December 29, 2005 - 08:17 pm: |
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always, when i replaced my battery, that's what it was reading (12.5) at 1500rpm aprox. (i was pushing the accel. a little bit) |
Platinum Member Username: Glasswolf
Wisteria,
Lane
USA
Post Number: 10819
Registered: Dec-03
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| Posted on Friday, December 30, 2005 - 02:07 pm: |
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alternators are 12.5 volts or so at idle. should be 13.8-14.4 above idle.
if it's staying at 12, it's not charging your battery.
the forward bias voltage has to be greater than the battery's charged voltage in order to recharge the battery.
make sure you test at the battery terminals though.
if that 12 volts is inside the car it may be a circuit with a regulated voltage.
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