[Roadsters] battery not charging

[Graeme Suckling]

On 23/06/2011 6:49 AM, Tim wrote:
> OK....
>
> Fully charged battery was at 13.20 right after the little green light 
> came on so the charge could not get any fresher.
>
> Cold engine (if it matters) @ 550 rpm the battery was 12.74 and the 
> alt was 12.20-12.50
>
> Warm engine (again, if it matters) @ 1000 rpm battery was 12.58, alt 
> was 16.2-16.4
>                                                   @ 3000 rpm battery 
> was 12.56, alt was 15.7 ish
>                       after returning service screw to idle: @ 600rpm 
> battery was 12.60, alt was 12.6-13.10
>
> Do these numbers look correct?
>
> I will check the grounds this weekend and also have the battery load 
> tested.
>
> Thoughts please?
>
> Thanks!
>
> Tim
>
>

I don't like the difference in voltage between battery and alternator!
There must be a fault in the wiring to have the voltage drop you see.
I am assuming that you are reading the two ends of the same cable?

-- 
Regards,
Graeme Suckling
1965 SP310 Datsun Sports
1971 P510 Datsun 1600
1972 PL510 Datsun 1600 LHD
1973 HS30 Datsun 240Z
1984 B120 Datsun 1200 utility
1993 ECR33 Skyline GTS25t
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Adelaide
South Australia.