Voltage Regulator

[outlaw912]

I was poking around my engine bay today and couldn't find a voltage regulator anywhere. Is it possible I don't have one? What would happen if I didn't?

I inherited most of my electrical system from the previous owner and the car is an outlaw, so nothing is standard on the car.

71 S...sort of

Is it possible I have a much later alternator installed with an internal regulator? How could I tell?

Erik

[boyt911sc]

Erik,

The earlier alternator with external VR use four (4) terminals:

B+............red wire.
D+............blue wire.
D-.............brown (multiple)
DF.............black wire. This terminal is omitted or disabled for alternator with integrated VR.

Next time you have a chance to look at your alternator, inspect the wiring at the backside of the alternator.

Tony

[Dmitry at Pelican Parts]

Originally Posted by outlaw912

I was poking around my engine bay today and couldn't find a voltage regulator anywhere. Is it possible I don't have one? What would happen if I didn't?

I inherited most of my electrical system from the previous owner and the car is an outlaw, so nothing is standard on the car.

71 S...sort of

Is it possible I have a much later alternator installed with an internal regulator? How could I tell?

Erik

Hey Erik - check out the link below. Hopefully it'll be helpful to you and give you some more insight into the voltage regulator/alternator in your car. If you have any other questions, feel free to post a Comment just below the article and we'll do our best to help you out.

Porsche 911 Alternator and Voltage Regulator Replacement | 911 (1965-89) - 930 Turbo (1975-89) | Pelican Parts DIY Maintenance Article


-Dmitry

[Joe Bob]

Most owners or rebuilders opt to upgrade to an internal regulator. If you are have voltage spikes verified by a meter it could also be an alternator problem.

Regulators are on the left side of the engine bay. If it is missing it's likely the situation above. Maybe time for a rebuild. Best to have it done locally as a lot of remans fail quickly or even out of the box. They MAY have a life warranty but you are the hook for labor to install it.