Help with charging system! Only getting 12.6 volts! (1 Viewer)

Nov 29, 2007
I have a newly rebuilt alternator in an HJ45 1980. All grounds good, anybody think it could be the regulator? I'm only getting 12.6 v on idle and only up to 12.8 when reving engine. It is a diesel engine......Any help or ideas?????? Battery is brand new big boy and is fully charged.......Please let me know of any ideas.....Regulator looks like it's mint!

Ron R

Drive a Landruiser, enjoy life
Dec 20, 2006
The Netherlands
Could be that something went wrong with the rebuild alternator. But I'm afraid it's the regulator if you're sure your voltmeter is good.
Are you looking at a meter in the dash or have you a handheld (multi-) meter connected to the battery posts?
And if so, have you tried a second one.
Just to exclude that you are hunting for the wrong item.

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