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Author Topic: Alternator Voltage?  (Read 616 times)

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Andy2009

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Alternator Voltage?
« on: 28 May 2009, 10:12:58 »
Hi

My battery is showing about 11 volts which rises to 12.5 when the engine is on.

Is this normal please?

Andy ::)
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Jimbob

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Re: Alternator Voltage?
« Reply #1 on: 28 May 2009, 10:15:39 »
There is a battery test guid in the maint sections....but that sounds a little low to me  :-/
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Jimbob

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Re: Alternator Voltage?
« Reply #2 on: 28 May 2009, 10:16:22 »
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mathewst

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Re: Alternator Voltage?
« Reply #3 on: 28 May 2009, 10:20:09 »
Thats to low, should be over 13 at least when engine is on
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KillerWatt

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Re: Alternator Voltage?
« Reply #4 on: 28 May 2009, 10:41:24 »
Quote
Hi

My battery is showing about 11 volts which rises to 12.5 when the engine is on.

Is this normal please?

Andy ::)
Way too low.

Official figures are 14.2V - 15.2V, however a good rule of thumb for any motor is 13.8V - 14.4V at 2000rpm with the headlights on for an acceptable charge rate.

Before you condemn the regulator, check the belt tension.
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