Low voltage

[Huw Powell]

You've done 99% of the work and diagnostics.

Your brushes are worn out, you need a new VR assembly (or if you really 
want to get gritty, new brushes to solder in).

About 15 months ago I bought a reman alternator, wasn't happy with the 
voltage, and bought "URO" one, on Amazon I think, which gave me .5 volts 
more.

I also like to replace the mounting bolts with S/S phillips head ones.

Your battery is definitely in good shape if you were able to drive on it 
that long, with the lights on!  Worn brushes will often generate "some" 
current, though, when they aren't quite completely gone yet.

I'd put a trickle on it to bring it back to a full charge ASAP, though.

- Huw

On 10/30/2015 9:14 PM, Christopher Gharibo wrote:
> I have a '91 coupe. I got a low voltage warning as I am about to start the car but the car started. The voltage gauge went from 10 to 12v.
>
> As I am driving I noticed the lights are not that bright and the voltage gauge reads 10v and is dipping. I got another low voltage warning. Somehow I got home and started checking the car.
>
> Alternator belt is tight. Battery is two years old and has never died. I pulled the alternator voltage regulator and the brushes have 1/4" and 1/16" length left. Clearly unevenly worn.
>
> What should my next step be? I am thinking either swap the voltage regulator or the alternator.
>
> Thank you in advance.
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