Alternator / electrics HELP!

[dundee911]

Hi Guys, new to the forum but been running my '76 911 for over 10 years now.

Just hope someone can provide some tech-help, pointers or things to look out for:

Been having charging issues lately - basically no charge getting to the battery although the alternator checks out all OK [pumps out up to 22v on revs].

HAVE JUST REPLACED THE REGULATOR and now get 13/14v on idle rising to 17/18v on revs, thus charges the battery. [ Also for your info, meter on the regulator terminals: D+ = 14 to 22v and DF = 8 to 11v]

HOWEVER, ignition light glows BRIGHT under revs plus both indicator/turn signal dash gauge lights are illuminated [dim on idle but brighten under revs].

Any suggestions? Just a bad earth or something more sinister.

If the battery continues to get 13/14v to 18v will it fry?

Will the power spikes on revs [max 18v] also fry other components, bulbs etc?

Thanks for your help in advance but if you need anything clarified, just ping me.

[Flat6pac]

It will fry the battery, the radio, relays, etc.
Time for a voltage regulator
Bruce

[30westrob]

I would remove alternator and take it to an automotive electrical shop. They can test and replace your bad diodes. Have them replace the two bearings while it is apart. Rob

[John W.]

Greater than 15v is too much. As Rob says get your alternator checked. I recently got mine rebuilt for $100. New bearings, bushes and regulator.