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Nippon Denso Alternator charge voltage question.

r1_pete - 27/6/12 at 04:56 PM

I'm running a small Diahatsu type Nippon Denso Alternator.

Doing some final checks on the electrics before MOT and noticed it was charging at 14.7 volts at 2000 RPM.

This seems a little high to me, does anyone running such an alternator know their charge voltage for comparison?

Cheers.

Pete.

This is the unit:

mini alternator

owelly - 27/6/12 at 05:08 PM

That sounds about right. It shouldn't go much higher as you increase the revs if the regulator is doing its stuff.

r1_pete - 27/6/12 at 05:41 PM

Cheers,

No it doesn't get any higher, I'll not worry about overcharging then.

britishtrident - 27/6/12 at 06:03 PM

Normally Nippon Denso charge just shy of 15v.

The usual critical test for high charging voltage is check the charging voltage at over 2,500 rpm with all the main electrical loads on (ie main beam on) and watch the maximum voltage as you turn the loads off. A jump to over 14.9 is generally bad news but Nippon Denso tend charge closer to 15v than most.

r1_pete - 27/6/12 at 06:11 PM

Cheers BT, I'll try that.

leeswesty - 27/6/12 at 06:23 PM

My is about 14.5 mate but i am having problems getting light to come on doing my head in so i am going to have to get auto lec in to sort it out

r1_pete - 27/6/12 at 07:54 PM

This is a useful page for ND wiring:

Linky

leeswesty - 28/6/12 at 08:50 PM

Thanks mate i did try still no light what light and size watt bulb are you using thanks lee