RE:Weak Alternator?

[Dan Hamren <dan@magnitude-electronics.com>]

Wolf ...said

My '84 4k runs at about 14 volts indicated on the center console
voltmeter until electrical items are switched on. Each item switched on
(lights, ventilation fan, wipers) draws the voltage down a little until
it is slightly below 12 volts. This is rpm independant. I changed the
brush housing and the symptoms stayed the same. Isn't the regulator in
the brush housing? Is the alternator bad/weak? Maybe there is something
else that would cause this?
TIA,
Wolff
Have you considered the guage?  I wouldn't trust it. Try getting it
hooked up to a voltmeter at a shop; they tend to have better accuracy.
Dan Hamren
87 5kcsq wagon (stabin cabin)