Alternator output voltage

5.0 V10 50v biturbo - 571 bhp
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WooshNI
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Joined: Tue Feb 05, 2019 7:31 am

Alternator output voltage

Post by WooshNI » Fri Mar 29, 2019 7:44 am

Hi everyone with 1500 RPM all loads switched off my alternator output is 13.3V seems low can someone else please measure their output?
Thanks.

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993turbo
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Location: Puerto Banus - Marbella

Re: Alternator output voltage

Post by 993turbo » Fri Mar 29, 2019 2:03 pm

Where are you measuring?
RS6 MTM C6 Avant (Daily Driver)
360 Modena (manual)
F430 Spider (F1)
+ 4 classic Porsches

mikep99
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Joined: Fri Jul 17, 2015 9:03 am

Re: Alternator output voltage

Post by mikep99 » Fri Mar 29, 2019 2:06 pm

Seems a bit low to be honest.
How are you measuring it?
Multimeters can vary unfortunately.
When measuring mine now I use an OBD2 dongle and the torque app on the phone.
This gives the voltage that the ecu is seeing.
On the RS4 B7, I'm seeing about 13.9/14v with engine running and no ancillaries on.

HTH
Mike

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WooshNI
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Joined: Tue Feb 05, 2019 7:31 am

Re: Alternator output voltage

Post by WooshNI » Sun Mar 31, 2019 3:24 pm

Thanks guys measuring with calibrated meter at battery posts ..doesnt sound good looks like its on its way out.

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