I agree with Loren, you can however, take indicator panel off (two
screws) and adjust little potentiometer on circuit board. with a
voltmeter attached to batery line you can dial in the lights to what
suits you :)

Alistair

On 28-Nov-06, at 11:35 AM, Loren Busch wrote:

The Westfalia manual says that green is greater than 12.5v, yellow is
less
than 12.5 v, and red is for less than 12 v.  This means that it takes
very
little draw down to go to yellow, just disipation of the surface
charge in a
short time after the engine is turned off may pull it down to
yellow.  Based
on my experience with two Westfalias, '85 and '90, it's normal to see
the
battery indicator drop to the yellow area and still have a lot of power
left.  When you get into the red and it stays there you may have
marginal
starting juice left.  I've left those lights tied to the starter
battery and
use a second added on voltmeter for the aux battery.