I'd say that is normal, not  great but normal.

what is your charging voltage at your positive alternator post ?
( should be 13.8 minimum , or a bit more. ...and I find that to be
fairly common on Vanagons ..which is not that high compared to newer
cars ) .

I asked a parts man about charging requirements for a red top Optima
starting battery today.
He said 14.1 to 14.4 volts , must have.
Many vanagons are not charging at that many volts.

What is your charging voltage at your battery ?

Check it at various places..
you'll find voltage drop the further you get from the battery ..and the
longer the wires to the device.

Scott

On 11/6/2013 9:11 PM, Andre Fiedler wrote:
> I have an 89 Westy and am measuring about 13.1 to 13.3 volts in the
> dashboard cigarette lighter plug.  Compared to my other more modern
> vehicle  (2012 Ford Edge with 14.2 volt reading) this  seems rather low
> voltage.  I am  curious if this voltage is normal or if what I am seeing
> is  unusually low?
> Thanks.
> Andre Fiedler
> Manitou Springs,Co
>