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89 100 alternator or a/c fan problem
Got a problem with the wife's 89 100 Wagon 116k miles. When we cruise
in the city for 4 day's with the a/c blaring. It will eventually kill
I've had the battery load tested and it came out ok, batteries about a
year old. The alternator will fully charge the battery if I leave the
a/c off for 20 minutes or so of highway driving.
I do notice though when the a/c is not running the voltage guage is
about 13 + volts. When the a/c is on and the fan kick's in it
immediately drops to 12 volts flat.
Is this a problem with the alternator not being powerfull enough to
keep up with the draw from the fan or is the fan drawing more current
than it is supposed to ? I seem to remember reading about a similar
problem before with the fan on the list.
The alternator was replaced last year with a bosch rebuilt for what was
essentially the same problem. But at that time I had replaced the
regulator part of the alternator and the alternator was still not
enough power to charge the battery when the a/c was running in city. So
replaced the whole alternator with the bosch rebuilt and it seemed to
even though I still thought the voltage was too low when the fan kicked
Any Ideas ?
I'm leaning towards fan problem, but I'm not sure what too check to
Thanks Everybody :-)
89 100 Wagon......... currently not running a/c even though it's 90+ ;-(