G'day Jon,
There've been good replies from others already but here's another angle to
look at if needed. If you find nothing wrong with the on-load charging
voltage and the ripple level, here's your probable answer. Identify the fuse
that supplies the warning light circuit, and you will probably find that
this also supplies the wipers and the blower. If so, clean that fuse and its
holder (and any dodgy connectors in that circuit if also necessary), and
your glowing will probably be cured.
I've come across this faint-glow effect in numerous Alfasuds, 105s and 116s
from all over the 70s and early 80s (not to mention in a couple of friends'
old Fords too, with minor variations). In each case the alternator has been
perfect and the problem has been a bit of unwanted resistance in the circuit
described above, usually in the fuseholder. All of these cars have had that
circuit wired up in much the same way, and a look at the circuit diagram
explains why a little resistance causes the faint glow, and why it's
worsened when there's a high charging load such as Headlights On.
If this fixes it, you'll probably have to clean that fuse again from time to
time, as minor corrosion returns and the glow re-appears.
Hope this helps,
Graham in NZ
Alfasud x4, 156, 1750 GTV
(About) alternator warning light in my '82 Spider... noticed lately that
it will glow, at night, if both the headlights and the wipers are on. It
will glow much brighter... if in addition I then turn on the heater
blower.
Is his normal? Am I looking at a weak alternator and/or voltage
regulator?
Does anybody know? Is there a way of testing things: I do have a VOM?<
Thanks!
Jon Kligerman
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