jwillman

I have been working on idle charging issues and today had a multi meter attached at the battery to monitor alternator charging at idle.

With car warm and at idle with cooling fan on I had 13.8v. I decided to turn on the head lights and voltage dropped to 13.5 and fluctuated between 13.5 and 14 until I turned off the head lights and which point it stabilized back at 13.8v.

Any ideas, coincidental?

Mrmerlin

sounds like your ready to go for a drive ,
put the meter away your done in the garage,
the numbers you posted sound perfect

MainePorsche

Numbers are fine.
After Stan's words the thread can be closed on this one.

Mrmerlin

what your seeing is the voltage regulator cycling between its low and high range,
if it was below 13.4 or higher than 14.2 then you might have voltage regulator problems.

jwillman

Thanks Stan. Just threw me when I had such rock solid numbers with the head lights off.