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GRB STi alternator / voltage
GRB STi alternator / voltage
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Old 02-28-17, 02:18 AM   #1
rasheedn
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Default GRB STi alternator / voltage

Hi there

i noticed my car on idle with no lights on and no battery load my voltage is around 12.6 V

As soon as i turn on the lights or add load it goes up to 13.8 - 14.2 v

Is that normal???

thanks
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Old 02-28-17, 04:25 AM   #2
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Default Re: GRB STi alternator / voltage

Doesn't sound normal. If idling ur voltage should be around 14.4V. 12.6V when engine is stopped.

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Old 02-28-17, 08:05 AM   #3
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Default Re: GRB STi alternator / voltage

Unless the battery is fully charged, idle voltage could be as stated. Adding a load does cause charge rate to increase.

Let me ask OP this question:

What is the complaint? If no complaint, don't be concerned with what you see as far as voltage change is concerned.
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Old 02-28-17, 09:53 AM   #4
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Default Re: GRB STi alternator / voltage

i just checked 2 other GRB sti

on idle climate control and lights off, voltage 12.7 V

turn on climate control or lights goes up to 14.2

seems we have something called "smart alternator" lol

maybe its sth for euro cars?
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Old 02-28-17, 02:44 PM   #5
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Default Re: GRB STi alternator / voltage

Mine's a euro spec it doesn't do that either

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